funny enough that it does not hold true.
"Exactly the same as on XP" is just plain wrong as on XP, Microsoft provided a software emulation layer for OpenGL 1.1 in case the card does not provide a driver (don't think that Microsofts writes drivers for Intel)
But yeah, if you have a good driver, OpenGL definitely benefits of the redesigned driver ... sadly, older cards which lack specific features needed for WDDM certification like the Intel GMA900 will not be able to use OpenGL at all on Vista even thought they are part of Vista Capable Systems, because the OpenGL driver is part of that and they only can use XPDM drivers. (why I know: because my tablet is one of those Vista Capables with a GMA900 and Max2D just crashes out in gl mode)
"Exactly the same as on XP" is just plain wrong as on XP, Microsoft provided a software emulation layer for OpenGL 1.1 in case the card does not provide a driver (don't think that Microsofts writes drivers for Intel)
But yeah, if you have a good driver, OpenGL definitely benefits of the redesigned driver ... sadly, older cards which lack specific features needed for WDDM certification like the Intel GMA900 will not be able to use OpenGL at all on Vista even thought they are part of Vista Capable Systems, because the OpenGL driver is part of that and they only can use XPDM drivers. (why I know: because my tablet is one of those Vista Capables with a GMA900 and Max2D just crashes out in gl mode)