I also decided to make my PS3 feel a bit less neglected and spent some time in Ratchet & Clank Future: Tools Of Destruction tonight. It plays pretty much just like the other two I have (Going Commando and Up Your Arsenal) so far, just a lot prettier.
The main differences so far are in some of the new devices you can use, like the Groovitron which causes enemies to stop and dance for a while, and in how weapons can be upgraded. The five-level per-weapon experience system is still there, but now you can collect and spend ‘raritanium’ on additional upgrades like extra damage, a larger ammo capacity, longer range, etc.
And, of course, there are a whole ton of different weapons, gadgets, armours, gold bolts, and skill points to collect… I’m not sure how many of them I’ll actually get to since my emphasis right now is on finishing and moving on to the next game, but I’ve managed to get one gold bolt so far at least.