That would definitely mitigate some of the risk, but I'd imagine they'd have to steer clear of new games that push hardware too much - even if every system running the same game runs it from shared memory, it's still optimistically one processor per connection. They're also likely to run into the same problems that Netflix is having with ISPs, but even harder, without caching as an option. It's like they tried to conjure up the least scalable application imaginable... well, props to them if they pull it off.