Also, I've got an older Samsung 10" tablet (the freebie given away at Google I/O two years ago). Samsung doesn't support it. Google doesn't support it. CyanogenMod, however, supports it just fine.

(EDIT: Samsung is apparently releasing Android 4.1 very recently, at least to German customers. CyanogenMod had it running back in July.)

(EDIT #2: Seems that CM10 hasn't got the permission revocation feature any more. Hmm.)