Foden has already elevated himself to a 10+ goals per season Premier League Midfielder, and with strikes in the CL Semi Final and the World Cup, plus a hat trick in the Manchester derby, there isn't much higher he can go in terms of personal achievement. I certainly expect him to be the first homegrown player to score 100 goals for City since Neil Young (unless I've forgotten somebody)
However, I don't recall many outstanding games, and in truth, his goals have often overshadowed a fairly anonymous performance, whereas Grealish was almost the opposite at Elland Road the other night.
Perhaps he'll slowly evolve into a Gundogan type player, because otherwise, we might be having the same debate in 5 years.