I dont game, but widescreen is nice. I'll probably load up War3 or something. A Mobile Radeon9600 Pro would be awesome. In any event, I suspect its more has to do with Nvidia's non-DX9 compliant hardware than the actual performance of the card itself. IIRC, using DX9, the FX series defaults to 32bit precision, versus 24bit for the DX9 Radeon 9x00 series. You can garuntee Nvidia wont let this go. In the end, I expect the FX5650 Go to perform just slightly below the mobile Radeon9600 pro as it shoud be.
Although it does seem fuzzy when you dont do the native resolution (1680x1050 for me).