I read on the official vista page that Vista will come with DX10 and DX9.0L
for backward compatibility, but DX10 will not be backward compatible.
Supposing I may use a DX10 compatible graphic card (Nvidia G80 for example)
with DirectX10 drivers on Vista and want to play an "old" game using DX9, can
I play this game without booting on an other partition, without installing
older GPU drivers for DX9 or even without rebooting ? Will an emulation layer
be present in Vista ?
(thanks and sorry if this was already answered)