I want to clarify something, as it's the "one little thing" that can be everything with rabbits... you said "Also I noticed today he has ate or drank anything." - did you mean that he *hasn't* eaten or drank anything? If so, that's a medical emergency for rabbits (if they go 8-12 hours without eating, drinking and/or pooping) and you need to get your rabbit to an emergency vet immediately.''
As long as he's still eating/drinking/pooping normally, then yes, he's probably upset and still adjusting. He may still smell remnants of the cats (since rabbits' noses are far more sensitive than humans and carpet cleaning may not be enough to remove that) and/or he may also be acting weird because enough time has passed for him to forget about all those other rooms in the home and you've essentially exposed him to too much "new" territory at once.
Basically, if he's not eating and/or drinking you need to immediately take him to an exotics-savvy emergency vet. If he IS eating/drinking/pooping normally, then I recommend limiting him to your bedroom like he's used to. Let him have limited and supervised visits to the living room OR limit his space to a portion of the living room and gradually increase the time spent out there and/or area in the living room he can visit until it's back to how it was pre-cats.