If the price is at $20 for these titles, then I think it'll be acceptable. If it is the same as PS3's discount rate of $30, then it would be too much, as that is how much most of these games are going for used on EBAY (just a quick search, didn't look for lowest deal).
Anything that forces prices to lower on some of these games for retail AND 2nd hand sales are good things, and maybe this discount price will make me consider purchasing games that I would refuse to pay over $20 for.