I've actually played SC1 over VNC while on a tablet, casually. With the exception of the noticeable click lag from the network, it was actually very enjoyable. I would definitely buy a version made for that form factor.

EDIT: a word

Interesting, I can't imagine you can get the same apms on that setup.

Not that I'm very good (or any good, really), just that on SC2 my numbers are terrible with a trackpad relative to my numbers with a mouse.

It's definitely not a feasible setup for playing against humans. You absolutely need a keyboard to play SC1/2 seriously. The use case, if I remember correctly, was the height of laziness-driven innovation for me: I wanted to play a bot match while lounging in a hammock and didn't a laptop at the time.

What really struck me, though, was how suited for a smallish tablet the original game is. If you dumb down the interface just a little it would be flawless. I've played around with a few mobile or tablet-based MOBAs trying to get my starcraft fix, but I can't find an equivalent in that or mobile RTS realm.