Each year in Barcelona, the mobile telephony industry meets at Mobile World Congress in order to unveil his greatest news. This year is no exception, although this time the devices are relegated to second place. Rather, the sales of mobile applications that steal the vedette.D First, Microsoft and Nokia have in turn announces the deployment of their respective online store. It contains, variable price, applications and multimedia content designed expressly for devices using their platforms, namely Windows Mobile on the one hand, and Symbian on the other. Nokia plans to launch its Ovi Store in Europe and Asia as early as next May, with its new N97, while rumored shop Marketplace Microsoft, this time in running, should be put into service this fall..

In addition to internally developed applications, the two new stores will offer the content produced by independent developers, like the App Store, Apple uses for its iPhone for almost a year already, and Android system, Google.

These are not the only way to dive in mobility: Research In Motion (RIM) and Palm will also launch these services shortly. The explanation lies in a few words thanks to Apple, we know that the model is profitable, and most importantly, it remains unclear to what extent it can still be more.

This is probably the term to hold the conference of Mr. Ballmer: ecosystem. For if each family of intelligent devices has its virtual shop, each will be exclusive. A puzzle for developers who want to sell their products on more than one platform.

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