That didn't take long. I suspect that in the back of their minds, Fox always regretted its partnership with Hulu.
I can't imagine what they're going to do with the hardware side, but the possibilities with both The Roku Channel and Tubi loom large. Howdy! can't hurt.
Given that Tubi is one of the hottest FAST services out there, I don't expect it to go anywhere. Building up intolerance for ads takes a while, and as long as the advertisers are willing to foot the bill, why not?