@ jalsomni
All companies including Sony are pushing for (cheaper) digital distribution. However as an additional option, just like all the other companies you mentioned above.
I bought many PSN games and I would love to download some high quality music videos to my PS3. But for instance Gran Turismo 5: Prologue sold much better on Blu-Ray disc than on the PSN and I am sure for bigger games like the full version nearly all Gran Turismo fans will want to have it on Blu-Ray disc.