The show I would love to see back on, but not necessarily remade (since it was slick and modern enough in the first place) is 
Total Recall 2070.  For those of you who never saw this late 1990s show, think Phillip K. Dick meets Raymond Chandler meets Isaac Asimov.  Superb writing, acting, set design, special effects.  Pretty much just superb.  Never been released on video or dvd but I hear that you can watch it in streaming vid if you reside in the USA (no joy for the rest of us unless you don't mind torrents).
I would love to see more of this show, but sadly all the really good tv gets cancelled and never brought back.  Like 
Rome, or 
Firefly or . . .