I said this in another thread:
PSN Bronze - what the current PSN is. Free multiplayer, access to the store, demos, apps, netflix, etc. I believe cross game chat and party chat will be free as well. I also think share/upload your games will be free.
PSN Silver - what the current PS+ is. Bronze + IGC, major discounts on games, 1GB cloud storage for vita, ps3, ps4 each, automatic downloads, etc. $50/year
PSN Gold - Silver+ play as you install, see what others are playing, help others with their games, cloud saving (directly saving on the cloud and locally as opposed to having to do it manually as is now), bigger cloud storage, maybe 5GBs each, and all other stuff they talked about on the 20th. $70/year
PSN Platinum - Gold + gaikai netflix like service streaming of games. $100-$200+/year depending on selection of games