The game list is quite big and you have instant access to ALL of them the moment you subscribe, also they will offer several shows on gaming and even air Space Ghost Coast to Coast!
They have mostly old console games, but the library will grow...
As a collector, I would feel just weird to just subscribe and have all of the sudden 100 games more in my collection, I usually don't even tolerate downloaded games unless it was never released on CD, like BeTrapped...
Yet I find it alluring, all the games on the list are worth playing...
EDIT: For the moment only US citizens can subscribe! CURSES!