Its really more a PR stunt then anything, Face it, its only a minority, who need backward compatibility. And Need its a big word.
The adoption rate is more then 67% and People, use and ressell there old gameand console to do so. like the 6% and the 11% who used the retro on ps3 and 360. Its low userbase.
Its really just to be able as a PR to say we have (that number of game) and its really sad too use some loop to push sell :|.
I was happy with my retro at first. And turn out I used it once ...