(Newbie Alert.) I voted that I would like to have an all-in-one device. I am surprised that I am in the minority by better than 2 to 1. While I don't have any knowledge regarding battery life, I under stand having a spare battery to swap out as necessary is not a big problem. One of the more common replies was, "No, I want the big screen." I assumed that the implication of the question was whether or not the N810 should also be a phone. I don't own a tablet yet and I certainly don't have any expertise in the hardware area. But why shouldn't the N810 have a phone built in? I'd love to have mobile internet, but without cellular service, it's kind of like having the latest and greatest car stereo - that only works when you're parked in your garage. Sorry if this offends any of the community, but it seems to me that carrying two devices is kind of silly if not just plain inconvenient.