Scrivener of Doom
Adventurer
Given what they've been acomplishing with the latest Encounters and Ghosts of Dragonspear Castle I'm also intrigued. I adapted Ghosts of Dragonspear Castle a bit and ran the first part using 13th Age, it's all looking good. I'll even be willing to try the system if they keep it up, if only to avoid the extra conversion work needed (even though customizing/creating stuff for 4E and 13th Age is a breeze).
Good points and that reminds me of something I should have added to my post.
I hated Murder in Baldur's Gate and thought it heralded more crappy WotC adventures (that's an IMO, of course: I know lots of people loved it) but then I got Legacy of the Crystal Shard and Ghosts of Dragonspear Castle and was really, really happy with both. If the other Next products are like those latter two I will be picking them up even if I am running 4E or 13th Age. And - who knows? - maybe eventually the system will grow on me after a few more really good products and I won't be a Next-hater any more.

Anyway, the ball is in WotC's court to deliver solid products. Spin won't cut it; only substance will.