I think I'll still be feeling the fine line between home consoles and handhelds because frankly if I have the time, I like playing my JRPGs in 4-5 hours chunks, and I can barely stand an hour on any of the handhelds (and that is in home conditions, with plenty of pillow propping).
The screen size is definitely also an issue. My laptop's screen is of higher resolution than my TV, and obviously a lot more portable, but I don't spend my time watching anything on it when I can use the TV.
We are not quite there yet to have handhelds connect to your TV at home and deliver the same power that a home console can, and the NGP's current design doesn't even have TV out (don't think the 3DS has either).










