Q: on wide-zoom

Recently at a relatives home,who has a wide screen tv; I was 
   playing with the remote zoom functions.
   Regular, Full,zoom, wide-zoom;  in the wide-zoom  4:3 was full 
   screen without "stretch o vision".  The 16:9 content show'd full 
   screen with small black bars top and bottom.

   This was an older tube type Sony, I didn't bother to try to pull 
   the monster away from the wall to get the model no. on it.    
   BTW it was a Sony.

   My question is:    Do the newer LCD's or Plasmas have this same 
   feature "wide-zoom"  and perform the same way with 4:3 content  ?


   Jack