In this particular case I would say that they should also release a disc version... but... As a general rule I would say that they should really start thinking on putting more REAL PS3 games on the PSN without thinking about the size.
I don't want a new 5MB Tetris at $0,50... It can be fun, but what I would really like to do is to buy GOOD games from the PSN. I really don't care if it takes two weeks to download. They should improve the download manager and that's it. If the game has a 10GB in content and they sell it over PSN, then that's great, I don't have to pay for an overpriced bluray, and I can buy a content rich game anyway.
Just to let things clear... I don't have a good connection. I have a 2Mb ADSL line... that's not good at all. But even then, I wouldn't mind for the download times.
It may sound crazy, but in my country (Argentina) the bluray prices are REALLY high. And that's one of the reasons the PS3 hasn't that many sales here. If they would put PS3 games that really take advantage of the console power, they would sell twice as much.
Cause selling them on the PSN means that there are not 3 thousand resellers in the middle, and that the games are not SO overpriced as they currently are.
I think I made my point. Thanks for reading this far.