This is what will be in the 7000:
Built in hard drive.
TV output.
USB connection (excellent!)
Space for EW03 and EW04 cards, which will also work in the 6000/6500.
(Presumably all the existing sounds including 01 and 02 will be built in,
or maybe there are 4 sound card slots?)
Some kind of MP3 capability, probably play, maybe save?
(transfering mp3s to the hard drive via usb will let you play them and transcribe composers accurately. This is effectively what I do at the moment by playing my mp3 portable through the line in sockets)
Lots more...
we shall have to see what turns up

Alec