If you look at the cache size of a cpu, its limited to a certain size for best case perf/thruput.
If and app excedes that cache, then you have latency, so imagine it in a MT scenario, where the OS itself isnt cache friendly for this, and causes latencies.
Now, even tho these latencies are there on XP, then we wont see improvements in the newer OS' til we reach 16 cores, which can be octo cores using SMT. OK thats just 1 differing example between the OS, not counting OpenCl, the vast usage of APUs etc that all will play a huge part in this as well, where we find XP lacking in design.
If you havnt got what Im saying by now, I suggest you go read up on it, and try several places, because Ive made it as basic as I can.
The game I showed you has a bare minimum of consoles gfx, the chart I showed you is the single largest body of known gaming statistics available, and show XP no longer leading, and if any one of you would have been present when XP was actually 60+% when these first started, and have followed it down in 3-4 short months where we see it ar 48%, thats a huge shift, regardless of what others think.
The new OS W8 will be here possibly as early as qtr4 2011, ATI is working on 20 DX11 titles, its easy to see any game can be done with a DX11 path and a DX9 path, without the need for DX10 at all, which helps the devs, for an easier cheaper solution.
All HW sold since 2007 is DX10 on up, so the older solutions will either be incapable or simply fail as theyre aging.
Say whatever you feel, I just brought you some facts, and tear them down and disrespect them all you want, cause next month or so, Ill be here pointing out how XP will be under 45%, and we can start all over again, cause I know I win, regardless of the fruitless arguments, and attempted misunderstandings