Every single point you've listed is available in Windows 8. Specific functionality introduced in "Dash" might not be available in a similar Windows 8 "Dash" application, however it's not impossible to do. You mentioned search and play music, cloud storage, performance, web search from the OS, similar experience on PC and Tablet? How blind are you, of course Windows 8 has this, and in fact, it's all pretty simple to use if you spend more than 5minutes on the OS.
Your blog is biased and not relevant!
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