I think we will see a range of things and there will be nuance. Some federated layer 2 systems will make better, more distributed, more secure networks that support openess and each other. Others will likely offer a fractionally backed token and be more of decentralization theatre. And all in-between. Caveat emptor.
Discussion
Federations aren't layer 2 anymore than an SQL database is
It's all theatre, that's the point