This is good news, sort of.
From what I understand, they're releasing OG SC as freeware (correct me if I'm wrong), which is helpful to those of us, that mess with BWAPI (programming bots and stuff). SC2 is getting an official API, but it'll take a while. An open-source engine would have been even nicer, but we can't always have the nice things…
As for the remake itself, well, there was a pretty good unofficial mod for SC2 IIRC, which might make it a bit redundant, but any resurrection to RTS as a genre is neat. I'll shamelessly admit, that I'd rather see kids playing some RTS than yet another CoD.