Sega's Wii version of Virtua Tennis 2009 will be as accurate as ever with the utilization of the Wii Motion Plus Wiimote device addon. Don't believe it? Here's a trailer featuring two "active" participants demonstrating the hardware. Then again, don't take their word for it either... VT 2009 hits the Wii in June.
Virtua Tennis 2009 Wii Motion Plus Trailer