Well, I'm excited!

The screenshots and small snippets of gameplay presented look familiar and fun. There's going to be controller support on PC as well (was one of my favorite things about D3). And cross-platform progression sounds interesting.

I'm not entirely happy about what happened with WC3:R, but I'm assuming some kind of lessons were learned with that, and with D2:R being made with a different team with closer interactions, I believe it will end up in a better state at launch.

(of course I'll also back-up my old copies of D2 and its installers as well just in-case)