my (nontechy) mother in law mentioned them to me yesterday, I (techy) bought 2 kebabs last night with bitcoin (through takeaway.com). I think you're right that mainly techy people have them at the moment, but I also think that with the right friendly UX exchange we could soon be approaching a tipping point.

Another thing; I didn't buy from my usual takeaway because they didn't accept bitcoin. So bitcoin acceptance was the primary factor in making me choose a new takeaway.