I certainly couldn't do any design work/coding on one
Tablets aren't for work. They're for, as you noted, recreation, browsing, research. Something comes up on TV,grab the tablet, surf the net.
Which makes me ponder. People find me when they're at home and doing research. Possibly tablet users are a bigger component than I thought. My layout isn't bad on a tablet, maybe I should be cleaning it up a bit though.