For me it's becoming important in the sense that I'm at the stage where the less consoles I have either under the TV( or stored away), the better. Its more practical and desirable for me to have a few devices that can play my back catalog. And with the exception of the snes and genesis, which hit childhood sentimental nerves for me, I have no particular affinity for modern consoles and no issue dropping one for its successor if said successor has BC features. I'd drop my ps3 in a nano-second if the Ps4 was able to play Ps1 titles, the Ps2 digital titles( the ones on Ps3, not the half-ass Ps4 effort) and general PSN content.