You're making a few logical leaps there. The first one is that because iOS may or may not be declining(I am saying this because that could change after the Phone 5 comes out) then the same will happen to android. The second one is that even if we assume that android will decline we don't know if WP will gain anything out of it. We're talking about an OS that has repeatedly failed to gain any traction. The latest proof of this is when Nokias CEO was working on his company best interest and took out symbian WP didn't gain ANYTHING out of it not only that but it actually lost market share since then. The third and the worse assumption you make IMO is that the rise of WP will help competition and innovation. Nothing that includes microsoft will ever help competition. They have failed repeatedly to interest people so now they are suing everyone with bogus patents, buying out symbian, there's a rumor they want to buy a piece of RIM so another buy out might soon happen, Microsoft need to stay far far away from the Mobile market and roll over and die they belong in the 90's and early 00's where they bullied OEMs, train 3rd party resellers to bad mouth competitor OS and shove windows down everyones throat every way they could.