They're both good in terms of their functions, but OpenGL wins because it is supported on Windows, Linux, Mac, etc. Microsoft needs to realize that they don't own the industry, that they only own Windows. The computer industry is a place where no one company can rule, and there will always be opponents. Microsoft also needs to realize that with Linux and other systems becoming more stable all the time, that their OS needs to remain stable, which they've poorly failed.
You say "10 hours configuring Wine to run Windows games?" I say, maybe 2 clicks in the (OUTDATED!) XP, but about 20 clicks (allow or deny?) plus a bunch of pointless reinstalls when Vista decides not to run your old XP-era application after it worked the first time.
Well, there's gotta be a balance somewhere, as Microsoft goes down, Linux and alternative OS'es go up. XP was actually sort of nice, but Vista is just killing it.