There's a potential convenience factor, but I wouldn't find this a particularly exciting use of cloud computing. It's little more than a content update. Computers can request data without making it a patch.That's actually a very good idea. I suppose there's all kinds of NPC type behaviour that could be pushed from the cloud without having to roll out game updates.
I'd characterize it a bit differently. As many have noted, digital data doesn't degrade and has little in the way of physical distribution cost.I think it's just becoming the reality that games are not going to be designed to last forever. That'll happen for PCs, consoles and handheld devices.
What is becoming a reality is that content providers want to make it a universal design assumption that digital data that falls apart, and on their financial terms and schedule.