Most dx 10 games don't look any better than dx 9 games (look at crysis in dx10 and dx9 (when the hack that allows you to enable the highest quality setting)
in crysis, the dx10 and dx9 on windows xp with the hack for full quality looks almost 100% the same, it takes a lot of work to find a difference and the only difference is the color contrast on a select few objects, but the dx9/ windows xp, will run at like 10+FPS higher in many cases
most dx10 games that actually have any noticeable improvement can often get those same improvements when the dx9 version is hacked to allow the enabling of some of those grayed out or hidden options. this shows that while dx 10 does have new features, they are not being used, and the slight quality changes are more for marketing than anything else
and even with out any hacks, you generally cant tell the difference unless you start comparing screenshots.
and to the user that said that making games compatible with windows xp is just like making xp games compatible with windows 98, this is not true, unlike windows vista and windows 7, going from windows 98 to xp actually had an improvement, windows XP supports more CPU cores, windows XP supports more memory, and many other enhancements that allow for better performanc, windows vista and windows 7 only added eye candy (while there were other changes, there not noticeable.there actually worst. when vista and windows 7 came out, microsoft boasted about all of the changes under the hood and all of the improvements made, well pretty much across the board, it is slower than windows xp.
when companies like autodesk make new versions of programs like MAYA, the system requirements are slow to increase, and in reality they actually go down as if you install maya 2010 on a really old PC with like 768MB of RAM, the latest version actually uses less resources
Newer versions of maya actually benchmarked higher across the board, new features were added and some UI enhancements were made but they were not done at the cost of performance. Why is it that professional apps are able to do this but microsoft cant do it with windows?
For those interested, when not working on my main PC, when in the college building and I want to finish up some graphic design work, even though I only have 1GB of memory and a 1.6GHz CPU on it, I am able to run maya and photoshop on it, and going from maya 2008 to maya 2010 offered a good performance boost in both the responsiveness of the edit view and also a performance boost in the render speed.
why cant microsoft learn from these companies and do the same with their OS and and their other programs, all of the microsoft apps get slower and more bloated in just about every new version