Oh that was my fault for replying having just woken up and not reading the question correctly.
Can't believe I forgot about the natural buffet that stall strips create. But isn't that also true of wings without stall (flow) strips? Don't they produce a buffet (stall warning) as the laminer flow seperates into turbulent flow further forward as the AoA increases?
I was thinking that the AoA value can be used with an air data computer to send a warning to the flight deck (it has been a while since I did Inst')... ? An indicator though is just that, an indicator. Oops, silly me.
What Oktas said above is correct.