Remote power switching is what has held me back. Even if it was an additional cost / addon I'd definitely look at picking up a dozen or so. Still I've been following for a while and hope to see some cool improvements over time.
EDIT: Actually being a raspberry pi, It might not be hard to build in that feature. I might just grab one today and see.
Yeah, remote power switching is definitely doable. It would either be wiring directly into the motherboard's or controlling an external power switch. The challenge is making it user-friendly, supporting it, meeting compliance requirements, etc.
I think it's doable from the pi headers inside pretty easy, fortunately these are all homebrew machines i'd use on so compliance issues aren't as big a deal. For work though, i'm right there with you.
EDIT: Actually being a raspberry pi, It might not be hard to build in that feature. I might just grab one today and see.