Blizzard has a real point about familiarity.... I'd be tough to convince to start editing video on a PC since I'm used to a mac, and it would also be hard to convince me to give up my PC for other things (such as web design).
If you grow up on Pepsi, you likely won't drink Coke later. The reverse is true. This is why corporations spend billions of dollars to target the teen generation, when individuals are old enough to make their own decisions and still young enough to be impressionable and have a long, healthy (or perhaps not quite so healthy) coke-or-pepsi-drinking future.
To continue the metaphor, which is better, coke or pepsi? Opinion... simple as that. In the end, both will rot your teeth just as fast, or quench your thirst, or whatever intended 'purpose' they may have.
In the same sense, both mac and windows, plus linux, function as computers that allow a variety of tasks. Though with either (any) will allow for almost every task (assuming you aren't specifically doing something dependant on the operating system, such as designing a windows compatible something from a mac), but each does have advantages, such as graphics and overall 'smoothness' on a mac, and various things beforementioned on the PC (such as, especially with linux, controllability/customizability, something that is somewhat lacking in macs).
With a user who knows what they are doing on either, it's easy enough to do most, if not all, tasks. It's all about preference. The question is more "Which do you prefer, Mac or PC?", not "Which is better, Mac or PC?", certainly not "Mac vs. PC".
They are both different and similar, so it's not quite like comparing apples and oranges, but more like oranges and tangerines. They're similar, but each has advantages and disadvantages. (Actually, I could continue that metaphor for quite a while, considering that oranges are regular and inexpensive (PCs), whereas tangerines are more rare but arguably better, or certainly toward a certain taste that fewer people share.)
As time goes by, as shown obviously by the intel change of macs, so the operating systems are now compatible, they merge to a point of being the same.
DOX and Mac OS1 surely were very different (though I have no experience in either, except just a bit of pseudo-dos within windows), but they have merged now to where they're both very similar.
However, I will note that macs have, for the most part, started the trends, such as mice, desktops, trash (aka recycle bin), etc. etc. However, Windows has (later) contributed to these, such as with the TWO! button mouse. Hehe.
Hmm... what's a jumper? Why is a jumper related to laptops, specifically, or is it?
As for compatibility, it's not much of an issue now. Some formats, like .rar, are a bit harder to deal with on a mac due to not having as many freeware/shareware resources available, though it's still possible. Other popular formats like .wmv and .avi also have trouble, but there are (slightly limited) workarounds. The only files that really aren't compatible on Macs are .exe's, though I wonder if that has or will change soon with OSX 10.4 (built for intel and such). (I don't know, as I'm am still running 10.3.)
One thing that is an issue is file extensions, which windows still requires, with the exception of a few programs that are able to ingore them (I think I remember this.... but I can't think of which at the moment. I think it was mostly with image files, so perhaps just things that are easily recognized), whereas Macs just ignore them, so sometimes you end up with a file just named 'filename', not 'filename.ext'. So the conversion from mac to pc is to add that extension, which is a bit tedious and only hard if you happen to not know the file extension required. Though, note that the transition from pc to mac is never an issue in that sense.
In the past there was an issue with compatiblity in several areas, but that no longer exists.
I suppose one slight downside is that the color-schemes and gamma of the displays (or rather output of the computers) varies from mac to pc, so this causes some trouble for graphics. The most notable for this forum would be 'web colors' which I believe are about 212 colors, not 256, as those are the ones for which mac and pc color-schemes overlap. Another example of this is shown in video, especially related to the gamma, not so much colors, and how it translates to a PC from a Mac or vice versa with images/video. I find that to be particularly important due to my field of video editing. When I make a video on my mac and I watch it on a PC, the results can be hard to see because mac gamma makes things brighter (it's based on a curve, so it's not just linear... very complex, so not gonna get into it right now), but this can be corrected, though it is an exta step. To add to the complications, NTSC (the format used by TVs, encoded on DVDs, etc., at least in the US and other countries, as opposed to PAL, used in other locations, which aren't compatible, in framerate, dimension and color-scheme) varies, so a TV, PC and Mac will all display the same video differently. The easiest way to demonstrate this would be to play a DVD on a PC, a Mac and a TV and watch.
(or insert MAC equivalent here).Apple menu>About this Mac, then click 'More info...'