I like Cheapy's optimism about better digital game sales. However Wombat and Shipwreck are right, the next Playstation and Xbox won't be digital "only" but it would work great for them if every game release gave you the option to buy it digitally.
To use an analogy, I buy everything with my card and never have cash on me but that doesn't mean other shouldn't be able to use cash. You just have to look at Steam to see that there are plenty of people willing to download their games. I have a 2TB drive with all 550 of my games installed. A 32GB Playstation Vita memory cards
sells for $100 and you can get a 1TB laptop hard drive
for the same price or less, so if console manufacturers drop the ball on this then I'm just baffled by why they can't get things straight.