Please think about using parts of webOS as top shell for ReactOS (for tablets and phones).
 
http://developer.palm.com/blog/2011/12/open-source/  HP webOS goes opensource.
 
http://opensource.palm.com/packages.html  here you can find parts of webOS source code (still not complete)
 
webOS provides amazing user expirence.
 
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С наилучшими пожеланиями, Александр.