Just wondering if anyone knows whether it is possible to retrofit the dual view screen to a 2017 vogue? 2017 Range Rover Vogue V6 Diesel
2006 Range Rover Vogue V8 Diesel - gone

Possibly, but I really wouldn't bother.

Once you get past the Oooo isn't it clever demo - it's a waste of time IMHO.

My wife never uses it, she doesn't watch that much, usually reads (or sleeps) but if she does, she prefers her iPad and AirPods instead of a smaller screen at an awkward angle with the clunky RR headphones.

God forbid that she share the driving - but that's a whole different issue. However, I think I'd also prefer my iPad.

Yes it is possible, it just plugs in place of the single view screen but then you need to be able to edit the CCF to get it to work which (currently) isn't as easy with the '17 on models.
However, to get the full benefit you also need to add the IR transmitter module in the roof next to the mirror and cable it to the audio amplifier module.

I would agree with Alistair about its level of usefulness.