hmm, although I like buying some smaller games via PSN and I have a plus subscription I somehow do not like the idea of spending the full retail price for a digital download... it takes a really long time to download the games and I can't lend it to my brother...
I see no benefit of digital download over a retail copy... as long as you do not live miles away from the next store, which would probably mean that you might also have problems with a speedy internet connection.