Well, that's kind of the big question heading into S5. We know Walt's too prideful to stop what he's doing, especially since he once again doesn't really have that much money built up from all this. On the other hand, Jesse's got a perfect setup for an out. Things seem to be going well between him and Andrea, he probably has a good chunk of money saved up from his time working for Gus, and he's not obligated to work for anybody who might kill him if he tries quitting.
I can picture Walt trying to get Jesse back in business, but unless they play the "Jesse cooks meth because that's the only thing he's good at" card once again, there doesn't seem to be any reason for him to even talk to Walt again.
That makes me all the more curious to see where they're headed with him, too.
No, it can't be. I am certain there is a scenario that explains Walt and Jesse sitting down on a couch watching TV, eating Doritos and drinking a cold one, while they are inexplicably in their chem suits. It would be riveting television.