It should pass 40m just from GTA 6 alone, but fully dependent on that game. Of course sales are dropping cuz the market is so stale right now. But once the games actually come, then it shouldn't be difficult to sell a couple of millions. There are multiple factors to take into consideration tho. Like whether Microsoft would keep supporting it, whether GTA 6 will be delayed, whether GTA 6 will stay console-exclusive at launch, whether Switch 2 can play third-party AAA games.