It’s going to be loud. Android/Linux is the most widely accepted OS in the last year and it’s about to go even faster:
"The other thing I think I’d point to is the $50 Android smartphone is about to hit the market worldwide. Smartphones are about to be put in the hands of another 3 billion people who don’t have them. And that’s probably the single biggest thing that’s happening right now."
see Andreessen: Android poised to explode in emerging markets
I think there will be repercussions for years to come. What retailer will hold that the one true OS for retail shelves is M$’s OS when it’s not selling and FLOSS is selling like hot cakes? This explosion marks the collapse of the Wintel monopoly. It might survive as some mutation but never again will consumers lack choice on retail shelves.