I think there's really three checkpoints here to determine the career arc:
(1) First game or two
(2) After 6-8 games
(3) Early next season

I think he's okay; Arm strength, poise and decision making are good and likely to improve. Accuracy is a concern. Not sure how much he can or will improve there, maybe he can work on it in the offseason but I think he's going to be a gunslinger type QB who flirts with making the top 10 in his best seasons. I also think they'll probably extend him to an overpaying contract and look to move on in about 5-7 years after a few quick Kirk Cousins-esque playoff exits. I could be very wrong here, it's only been 4 games, but that's the vibe I get from him. He's still better than anything the Bears have had in the last 30 years.

I think his floor is Jameis Winston and his ceiling is a Donovan McNabb type of player.