but i thing freaks me is whether the Vista & DX10 m/b /gfx. card will be able to play the good ol' games like nfs mw, gta sa..., without any hiccups.
coz if you remember, some games, like nfs pu, nfs4 have trouble in running in XP & DX9 cards.
i just found this in GameSpot..
Quote:
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We're going to see games developed for DX9 but written with the understanding that DX10 is coming. The transition isn't going to be too difficult, according to Epic's Tim Sweeney: "DirectX 10 is a nice incremental step up from DirectX 9, so games currently in development on Windows XP/DirectX 9 will be able to move to DirectX 10 with minimal hassle." Smartly architected DX9 games can be rewritten to incorporate DX10 fairly easily, but we can expect many of those initial ports to use the faster DX10 API to only improve performance because artists and programmers will need extra time to design and implement completely new DX10-powered effects.
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so this applies only for the games currently under developement/just released one.

link=
Game Spot Features