A little off topic, but I just finished 23 days of travel up the Amazon River and my Android phone (Galaxy III S with 1280x720 screen) was the perfect combination of portability, Internet access, application access, taking pictures and video. Perhaps a smart phone instead of a tablet would work also? With a full power large format phone, you do give up a lot of ease of use with an on-screen keyboard.
I think the real change will come when we have living environments where screen displays are everywhere and we basically live in the interface. I just submitted a Leap Motion developers application yesterday and I can not help but hope for future living environments that have sharable flexible input and display devices that automatically link up with a super phone in my pocket so I still have all of my data always with me.