It seems Sony will release a retail compilation of its most famous PSN titles.

ESRB has rated ‘Best of Playstation Network Vol. 1′. for Playstation 3. This compilation will include four games: Fat Pricess, Tokyo Jungle, Sound Shapes and When Vikings attack.

ESRB Rumor: Best of Playstation Network Vol. 1. | VGLeaks 2.0

I think that is a good idea for those who are not comfortable with the digital-only distribution.