Actually I'd kill for three hours of battery life. It's sufficient for most meetings, for most airline flights, and for lunch or for smoking a cigar in the evening on the back porch. It's not an all day computer. It's a trade off like any other computer. The iPhone actually underclocks their processor to increase battery life at the expense of processing speed. It's a different answer to the trade off.

My point was that for those times when I need to do computing tasks (like annotating PDF documents) as opposed to smartphone tasks (like browsing the Internet) my computer is better than an N900. If, OTOH, I had to use my computer with Skype as my primary phone, it would fail miserably.

It's all about competing priorities. The ultimate device does not exist and I will predict that it still will not exist in step 5.

My ultimate computer/phone is about the size of the Nokia 2630. Runs a quad core 64 bit CPU at 5GHz or more. Doesn't have a keyboard because it uses voice recognition, eyetracking, and in air gestures for input. Has a flexible, full color, HDMI roll-out display. Is constantly connected via 4G. Runs for a week without a charge. And is free from any phone company. Until then, trade offs are a fact of life.