Harman wouldn't have bought it to drop it. My guess is they'll reduce the price and implement it as a streaming platform across their brands - their current weakness is they have weak and disjointed platforms i.e. they have jack sh*t , and in typical incomplete WHF fashion nowadays, remember Harman owns Arcam too.
NAD/Lenbrook/Bluesound have BluOS, Denon/Marantz have HEOS, Sonos. WiiM have their own excellent platform. PlayFi is crap. Naim has an established platform, ditto Linn.
So the Harman group desperately need a decent platform, and Roon can provide it, along with streaming income, pun intended.
I see Roon as a streaming enthusiast product, like high end cartridges for turntables.
The logical and correct thing to do would be to implement it as a platform and offer the app for free on the Harman group of products. And maintain the current model for third party products, hopefully reducing price, but I wouldn't hold my breath.