I'm not convinced video will be a big thing, well unless it's displayed on a really big TV...

I think it'll be a feature but just one of many rather than the "killer app".

This seems to be saying something similar:

http://www.theregister.co.uk/2004/11/01/radio_killed_videostar/

As for what's the next big thing, good question. I don't think anyone can really tell before hand, figure out what should sell and try it...

It'll need to do a lot of things but should really concentrate on doing a small number of specific things very well.

It's certainly becoming possible to build something really potent with all the hardware and software components becoming available these days.

Portable Psylent anyone?