Exactly, it's not that different from 4G and is going to perform pretty much the same, but it will require new phones and will provide an excuse to increase prices for mobile internet plans.
A better use case is SD-WAN. You already have fiber to your building, and you want a supplementary connection in the event the fiber line gets severed, to ensure business continuity and no outages. At the right price its a no brainier to replace SD-WAN 4G modems with 5G modems.
5G is coming for dsl/cable/fiber, not to get everyone to replace their phone.