A couple things come to mind. First of all, I think you want to do something because super-tall tomatoes will be a problem. So, don’t just sit back and hope. My ideas:
1. If you can, move your cages a few feet so that the plants grow at an angle rather than straight up, that can give you some room. Sooner is better as it will be harder the longer you wait.
2. You could lop off some of the top growth and encourage a lower sucker or two to become the main stems. That will set things back a bit but might be worth it in the long term. I had a main stem snap due to high winds a couple weeks ago. I cut it and hoped a teeny sucker below would take off. It’s beginning to look like it will work, but it’s gonna be a bit.
Good luck.