Everyone can make an educated guess on the type of tech on the next Golf - there be some innovations but broadly speaking it will be tech seen on other cars.
As the new Passat (in Germany at least) can have a head up display, traffic display, tft dials - there's your starters.
Then there's the buzz about cars that drive themselves - so more of that.
Gesture control? That's appear on high end cars - intelligent headlamps - they will be there as well.
There will always be unknowns but car makers love to do this sort of thing, take tech that has been developed by outside companies and will appear on many cars and make out it is their own.
James