Maybe, maybe not. All the games you mentioned are quake derivatives and as such use OpenGL so they'd run fine in NT 4 =)
Hrm, not all of those games work on OpenGL. Operation Flashpoint is NOT OpenGL at all. Half-Life and Alpha don't mix, I've tried and it bombs. Have you actually ran games other than Quake3 and Civ? Operation Flashpoint and Unreal Tournament, along with the vast majority of DX8 games will not run under NT4. With NT4, I'm limited by the titles I play/use. You're not a competitive gamer, its not a big deal to you, but it is to me.
Honestly a 64-bit chip for any 'gaming machine' is pointless. Win2K installs and runs on Alpha up to RC2, infact my PWS600au came with Win2K on it. The only games I play are Q3 and CivIII and they both run great for me.
Yes, I have agreed that a 64bit chip will be gaming pointlessness -- but I want the 64-bit chip for something I can do later, not NOW. Games are what I play NOW and I also work on things that do benefit from 64bits. Next generation games are going to utilize some serious power, I wouldn't be surprised of some of those games are going to be utilizing 64 bits.
Win2k installs on Alpha up to RC2, but I'm stuck with that OS and nothing more. Sure, RC2 is stable, but what if one of my COM objects only works with a released version of Win2k? Where am I? Stuck up a creek without a paddle.
What I need is a gaming processor that can do everything I want NOW and everything later. Hammer is it, I'm going to buy that chip to run games and workstation level applications. I'm not going to screw around with a beta OS, or a *nix OS when I can have something that is tested, released, supported AND runs everything I want, along with my employer.
When that happens, call me with your Sun/Alpha/MIPS/CISC solution. Until then, x86 just plain owns.
vash