2.) AVX/2 / SSE4.2 in games?? LOL as far as im informed they mostly target SSE2(and SSE3/SSSE3 sometimes) in the most advanced game engines and mostly "scalate" up to 3 cores and the cheap game engines hardly have SIMD at all
3.) As far as i know Wine is close enough to performance in most cases to windows(on nvidia as far i can tell) and the translation layer(glsl/HLSL) is quite fast too +/-10% difference in most scenarios
Actually wine issues aren't coming from the translation layers but from the windows API itself or corner cases that drop to CPU render as fallback since many engines are very hackish and ovbiously they don't support DX10/11 API yet
michael made some article about it sometime ago http://www.phoronix.com/scan.php?pag...in7_2010&num=4 and so far only unigine heavens[which is uber taxing and very well written] show a significant FPS drop due to a software fallback that got fixed in the 1.4 series i believe.
so stop sreading FUD and investigate before go bitching and ok michael didn't test BF3 but i can tell you Crysis warhead and crysis 2 run very close to windows this days[wine 1.5.26 and nvidia blob]
what wine will probably do is help the FOSS drivers to improve many corner cases and performance bottleneck since it will stress the driver way more than xonotic or openarena can handle