Microsoft has been losing its Windows franchise since two key events:<p>1. Netscape introducing navigator<p>2. Microsoft stopping development post IE6<p>This has actually given the web browsers a modicum of stability and people were able to develop against a stable medium, and allowed Firefox to catch up in terms of compatibility.<p>In order to regain its Windows franchise, it needs to reimpose the Windows tax.<p>Firstly, by making Metro IE10 plugin-less, it kills Adobe Flash as a navigator-pretender.<p>Secondly, by introducing a lot of IE10 specific extensions, it hopes that developers will start to make use of these, eventually leading to the balkanization of the web, with MS having the highest share of desktops, it hopes it can buy another 20 years of windows tax.<p>Thirdly, Apple's experience has shown that without plugins, developers will either have to choose between HTML or Apps. Now Apps are a great way to create lock in. The existence of plugins threatens that.