OK, I’ll bite and maybe throw a few new things into the mix.
What will be the “next big thing”? As @p_clough says, there is a difference between the wines appreciated by wine lovers and those that are successful in the MASS market.
Do you know who the second largest grape growing country, and (at least) the 6th largest wine producer in the world is? Any guesses?
I see a time, not too far in the future, where the economies of scale (in grape production, but also all the ancillary costs of production and bottling) mean that the best value wine on the shelf will be from China. Big chains will be happy to sell this and to take the money from large brands keen to promote these new products to “break into key markets”.
This might also be the case at the higher end, though it will probably take longer there.
In response to the above, I also think that large producers in Europe will have to fight on a more level playing field with large ‘regional’ producers like “South Australia” and “Western Cape” as well as the new Chinese production, and therefore the response will be to take more advantage of ‘Vin d’Europe’ classifications to create multi-national blends with a lot more wine being sourced from Eastern Europe and the Balkans as well as the large volume producers in France, Italy and Spain.
The results might therefore be that there will be more investment in those countries, and the best parcels will then also get more attention, and we will again see a resurgence of quality wines for wine lovers from Bulgaria, Croatia, Romania etc.