A small flat box with a network port and a HDMI out. It fits on a vesa mount, and has the holes to mount an LCD or Plasma onto it. It boots in seconds like always, and if not connected to anything else, searches for a controlling Amiga somewhere on the network. A decent modern, but not too expensive graphics chip. An updated AmigaOS (not anything else) so the smooth multi-tasking really is there - not pretend jerk-o-multitasking like we still get on Linux and Windows - and if there's a crash (cos there will be I am sure) a quick guru and reboot will be fine.
Then add a new Scala.
Maybe then Amiga can dominate digital signage for a start and we can rid the world of this shite - http://www.flickr.com/groups/657212@N21/pool/