I think the MK 8 are going to be a success,
The standard Golfs now are more than a little plain and yuk, but they obviously beef up pretty well when they morph into the performance versions.
Having seen the Touraeg screens in person and the way they sweep across your view, which think the MK 8 emulates then the cabin is going to still be a nice place to be and I think the sweeping screens are better than say the MB A Series extended screen that looks a little bolted on.
Personally cannot see much downside, there will be evolution in drive and BHP and thats evolution off what is accepted as something pretty good in the MK 7 series that even new contenders have not bettered and the interior will be an improved one - more tech might not be for some, I was a bit anti, but having just lived with the TCR virtual display for a few days, I am already converted and if its anyway like the Touraeg that saw, its an impressive layout.
Real judgement can only come when see the performance models in their beefed up form, but personally think VW will slam dunk as the competition falter with their latest outings.