I gotta say, this excuse is kind of tired. There are a lot of interesting games and concepts out there on steam (for cheap usually). It's the gaming of equivalent of you should get out more. Plus, Steam's done this for most every major sale anyway. The idea is to introduce people to these interesting games in some way, instead of only offering useless crap for the same old $60 blockbuster drivel like everyone else does. I applaud them for it.
But seriously, read about these games. Check them out, watch youtube LPs or whatnot, see if they interest you. Hell, most probably have demos.