Bronny James is only 19 (turns 20 in Oct). I think he looked fine in summer league, he showed he has the core athletic ability to run with the summer league talent. He didn't stand out in any way, was really just kind of average, which still is not bad for a 19 year old. But he has a long way to go before he will be ready for the NBA, as is the case with most summer leaguers. He is probably not any better than most 2-way players, but he got a contract. He has a lot of potential ceiling in my mind, but it is just that, only potential. He is probably better than Davison was at 19 for example.
He probably belongs on a 2-way deal, playing mostly in the G-League. I don't see a future starter and maybe not even a future bench rotation player. I see a player who might make it and be in the league for a bit, on the end of the bench. But a lot can change when you are only 19.