That flip pad is 12 pounds and 3 inches thick I think....so its not that portable, but it's still not like lugging a desktop around. The batt life they say is 4 hours...i don't know if that is for one or two batteries...the computer has room for two batteries
The foldable notebook was an interesting innovation IMO...you have the equivalent of a 20" screen to work with! :-D (and you have the number pad which I so enjoy using, me taking data and all)
Alas, its even more expensive than the pb, tipping the scales at over 5 grand!