In my humble opinion, I think the 770 is one of the best portable devices in all the land. It does what its supposed to do and it actually does it better than even UMPCs and tablets. That said, they're improving it slightly in the next iteration by potentially adding a webcam and WiMax. What won't it have? A SIM-card slot. The 770 is supposed to sit somewhere between a PC and a cellphone, so they don't really think the 770 will have cellular connectivity any time soon.
While the cell phone maker is taking a never-say-never stance on the issue of cellular connectivity, it maintains that there are no tablet devices that can connect to mobile networks in the pipeline.