I'm thinking it will bugger up their plans to buy Red Bull F1. Ferrari will supply Red Bull in the short term now that they've dumped Renault - or Renault have dumped them, possibly to buy out Lotus - but if Red Bull start beating Ferrari regularly that deal will be pulled.
So, Red Bull are probably looking at years of being behind in F1, or they will pull out altogether. I can't believe VW can afford to buy into F1 now, not unless they already have some kind of binding deal in place.