Now that every console is not guaranteed to be connected, offloading work to cloud computers will not be used by developers, robbing us of potentially huge performance increases. Knowing that part of the user base is offline, no developer in their right mind is going to take advantage of that capability, forcing all the physics and AI to be calculated locally- that eats up clock cycles and results in lower framerates.
The same thing happened on the 360 when MS offered a unit without an HDD. Games like Oblivion and Skyrim suffered from texture streaming issues and pop-in because the developers couldn't count on a hard drive being there for caching, so the code was written assuming it WASN'T there. Any time you split the user base and remove standardization from the hardware, you remove the main advantage of a console- fixed specs and capabilities.
Any other thoughts on things we'll be missing out on now?