I could be wrong, but I'm 99% sure the i8910's resolution is 640x360. I memorized it's specs a while back because I always wanted one back then, for the camera, display, and speed. It's one of the best S1 devices.

Edit:
Type AMOLED capacitive touchscreen, 16M colors
Size 360 x 640 pixels, 3.7 inches

That's from GSMArena. Thing is, the i8910's display is 16:9, so WVGA isn't feasible for that device.