Sorry OP but most of the things you've listed have nothing to do with the PS3 and more to do with the servers or the devs simply not wanting to do them. Not everything they said they can't or won't do was blamed on the PS3.

The PS3 limitations mostly applied only to the console's memory. The UI had maxed it out so we can expect to see major UI improvements in 4.0. Zones can also stand to be much larger now with more impressive landscapes and landmarks. It's also likely that we'll get new gameplay systems and features that take advantage of the extra memory available now.

Things like housing, inventory, retainers, the glamour system, etc. are all limited by the server hardware. We know that the servers are getting a massive upgrade for 4.0 so some of these things may see improvements (we know inventory is for sure at least) but it's impossible to say which and to what extent.