I demand your predictions!!

Mine are as follows

Wii2 - Wiimote with built in motion+, better speakers, built in microphone, wireless nunchuk with equally good motion sensing, and possibly a speaker as well for surround sound. Support for Wiimotes, balance board, original WM+, nunchuks and classic controller for backwards compatability (hey, they connect via bluetooth so why not)

720 - controlled by a combination of a camera and 2 controllers that are quite similar to what you would get if you sawed the 360 controller in half (ie 2 nunchuks but without motion sensing, and probably more buttons)

PS4 - Upgraded sixaxis, looks extremely similar to the sixaxis but with motion sensing approximately equal to Wiimotion+)

EDIT: I should probably say upgraded Dualshock3. They wouldn't take away rumble again :P

WiiHD- Same as what you said, but intergration with the new Wii Camera.

Nextbox- We saw it yesterday, add a controler or 2.

PS4- DualShock4, The patented motion controler we saw a while back (with the ball things on) and some PSEye thingy.