I'm technically using a tablet at my gaming table. I stopped using it in tablet mode, though, after a month or two. The smaller screen size on a tablet means that, even in laptop mode, it's only about as tall as my DM screen, so there's not much distraction.
I mostly use it in tablet mode when I'm doing planning. It wasn't bad in tablet mode, I just found I liked it better upright. I think it's very much a "how do you work" question. I type very fast and write very slow, so I get better notes typing. But, it's more portable and I get better ideas writing, so that's how I plan. Plus, pdf books are much easier to read in portrait view. PCGen is much easier in landscape.
That's an aweful lot of non-committal information. I hope there's something helpful in there, though.
Oh, and the price on convertable tablets has come down a lot recently. When I got mine, it was roughly $2,000. Now, you can get one that would blow mine away, even accounting for the tech curve, for $1,100, IIRC.
FWIW, I got a Gateway and like it. It seems to have held up pretty well and, after putting some additional RAM in it last week, it'll hold me for another couple of years.
As a note, MS OneNote is worth the price for gamers. There's a learning curve, but it's a fine piece of software. Also, Excel, with the columns resized and zoomed out to an insane level makes excellent impromtu graph paper. I've done multiple quick/preliminary maps with it.
