I agree with you. When I want to enjoy very high resolution games then a big monitor is first choice of course. But mobile phones will display some more realistic graphics also. I am working on a scenery like this for one of our customers. I cant tell you much right now because of a NDA, but it will show interesting detailed graphics, although there are still constraints compared to a PC.

Regarding gameplay I already wrote you that I can imagine some nice gameplay (adventure games as an example) where you still have a big character on screen and some detailed scenery around. Something like this would work fine on a phone. But you will see RPGs, shooters and even RTS on phones also, maybe a bit more stylized to recognize units better on that small screen, but it will be there in the near future.