I could also see it do horribly, ala the original Surface Table thing (did they even sell those?)
Personally, I hate touchscreens. I recently went to Logan International in Boston, and discovered that the big boards with flight/gate listings had been replaced with wide-screen TV-sized touch screen interfaces. It took me almost five minutes to get into the touch screen interface, figure out how the search function was supposed to work, realize the search function was broken, and then scroll through the listings to find my flight. In ye olden days, I could have stood there looking at the board, and either seen immediately what my gate was, or waited thirty seconds or so for it to cycle to the second page if there were a lot of flights.
Windows 10 actually does look very good. They've rolled back the blunders of the Win8 UI, which is really the only reason I can see for somebody not upgrading before. There's really no excuse for continuing to use Win7 or god forbid, XP for much longer.
Besides, even when the stars line up and my phone really does reliably give me updates on the flight status, digging it out of my pocket, unlocking it, etc is more hassle than glancing at a status board as I walk past.
(Though as I said in another comment, I still check the boards when they're close by, just to be sure.)
If they make W10 easily deployable (no friggin cloud sign-on) and it is not a training hassle compared to W8, then I see adoption going up quite nicely.