If online sources are to be believed, the ITV-X app is to be made available on the V6, so to say "all new apps are TV360 only" is not strictly true.
That said, Disney+ is currently TV360 & stream-only, but as a general point - apps on Virgin Media TV boxes aren't like Android & iOS where you can install what you want... they are preinstalled by VM and end users don't need to do anything.
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