Microsoft computer accessories and Windows mobile are both struggling.

[bdbdbd]

@Mrstickball: Thanks for the info about Android marketplace. I knew Android has standard features, but never thought marketplace would be one.

The reason why Nokia accounts so much for Symbian sales, is because Nokia sells so many phones with Symbian. At the moment Symbian is the most common mobile phone OS in the market.
And the reason why other Symbian manufacturers are looking elsewhere, is because of getting beaten by Nokia in terms of competing with Symbian phones. If someone is beating others with Android and it doesn't provide the results they wanted, the manufacturers look elsewhere again.
The strength Symbian has at the moment is, that it has a strong supporter behind it.

At the same time the mobile phone games market is growing, the handheld gaming market is growing too, if i'm not mistaken. The growth of mobile phone gaming is irrelevant in the context, if it doesn't happen at the expense of handheld systems.

Despite the similarities of the systems, in the end it turns to what kind of games are available and game specific devices have the advantage of being designed for the games on the system, while smartphones has to be designed to perform multiple tasks. You can make a games phone like the N-Gage, but outside of it not being good with games to begin with, it was horrible in other aspects.

I wouldn't call it shrinking, if a company isn't losing in sales. Though, it's not growing either.