Though it will be difficult for Windows or Nokia to take a majority share, there is always room for more competition in the smartphone market. If either of the major incumbents begin to stagnate there will be room for new players to expand their share. Just look at where Blackberry was ten years ago and where Blackberry is today.
I think both the Windows and Nokia operating systems can gain market share in the United States. Consumers typically prefer having several options to choose from as opposed to only one or two options in a market. As long as the Nokia and Windows operating systems remain competitively prices compared to the Android and Apple operating systems, and provide their own unique features along side comparable features to their competitors, then they can gain market share.
Yes, I think that Windows and Nokia operating systems can sell phones in the United States despite the dominance of Apple and Droid systems, because these systems can find a niche market. For example, Windows would be good for older people who are used to using Windows computers. They just have to tap their market.
I believe Windows and Nokia operating systems can sell phones in the United States despite the dominance of Apple and Droid systems. There is always more room for competition if firms want to be competitive. This means better service at lower prices. I believe companies can make a decent profit in any market as long as they can cut prices or offer something valuable to the consumer.
Windows won't be able to sell many in the US-Androids global market share is at 80%. Apple is around the 14% mark and windows/blackberry fall into the last category, in the US, it's almost 50/50 between android and iOS with a small portion going to windows and blackberry. The Live Tiles interface isn't the nicest and android is completely customisable, so much that you can even make an android look like a windows phone!