I dunno, I think iPad owners are probably willing to make the tradeoff, and you can get an iPad keyboard fairly easily.
I've often wondered how much I'd use a tablet vs a PC, and since realized that I'd use the two things for completely different things (normally); PC for work, tablet for screwing around. I'm not the average user really, but I think thats not too weird of a stretch to assume other people do the same things. I know lots of people do work on tablets, I am just not one of them. Get me a tablet with a serial port and maybe we can start getting somewhere, but until then I'm stuck lugging a laptop/ultrabook around.
There are proper keyboards for the ipad (this is being typed on a logitech ultrathin keyboard ipad cover)
I haven't tried the surface version of office, but the web versions of office definitely lack features compared to the desktop versions (for example, array formulae)
I've often wondered how much I'd use a tablet vs a PC, and since realized that I'd use the two things for completely different things (normally); PC for work, tablet for screwing around. I'm not the average user really, but I think thats not too weird of a stretch to assume other people do the same things. I know lots of people do work on tablets, I am just not one of them. Get me a tablet with a serial port and maybe we can start getting somewhere, but until then I'm stuck lugging a laptop/ultrabook around.