A good cash TV show would have:
At least one very very bad player
Gambling side games
Deep stacks
I think using actual cash, rather than chips, would emphasise a thing or two
A few characters
People want to see some crazy stuff in a cash game. Thus it is better filmed in a 'home game' type environment.
As long as the cash is kept in bricks and not broken up. The Poker Den crap that Barry Hearn does seems to be 85% 'watching people count money'.