@ravinmachine
I think you are not understanding the idea behind smartglass. The idea is not so much that one device becomes master or servant to any other device, the idea is that there is a free flow of content and information between devices. If they do it right it will allow the user to be the center of a device enviornment rather than the user having to akwardly move between devices.
That is the magic of win8 and skydrive that I think a lot of people are missing: It is not about the interface (which is actually quite like able once you get use to it), and it is not about being a more efficient OS (which it also is, makes my netbook feel like a real computer), the beauty of win8 is cloud support. If I log into my phone, desktop, laptop, etc I have all of my social stuff on all devices (social hub, email, chat client, etc). And if you set up Skydrive the right way you can seamlessly sync your documents between devices as well. For example I have skydrive on my computer, my wife's computer, and my netbook where I can save a document to "my documents" or the "desktop" and the file shows up on all of these devices. If I make a change to the file, then it updates on all of my devices. If I delete a file, then it deletes off of all my devices. If I am on a friend's computer and need a file I just log into skydrive.com and can get to all of my documents and desktop files. Not a huge deal for people who only have 1 computer, but when you are spread out on a multitude of devices like I am, this feature is a huge lifesaver. I no longer have to worry about where a file is, of if the version on my current machine is the newest one, etc. It also acts as my off-site backup for all of these files which is nice (though I also keep local backups as well... you can only trust MS so far lol).
Smartglass takes this philosophy of transparent hardware to the next level with how you interact with media. What device the media really lives on does not matter, and you can interact with media on a whole new level. It works with the xBox360, but really this is just testing for what comes with the next xBox that comes next year. Rumor has it that the xBoxNext will run x86, and full blown win8 and basically become the Microsoft PC to complement Surface and the rumored MS Phone coming out 'soon'. If such rumors are true (which they may or may not be), then the console becomes your PC, your PC transitions to become your home server where the bulk of your content lives, and the phone and tablet become real extensions or complements to the xBox 'PC' by adding functionality while also being able to pull information from your server.
So yes, it seems backwards now, but as the next gen hardware comes out their strategy will start to make a strange sort of sense. One interface type across all devices (phone, tablet, PC, console, and server), with similar software across all devices, and with access to the same data across all devices. It puts Apple's iOS vs OSX scheme to shame, and it really makes the whole Linux/Android thing seem kinda poorly though out. Not to say that these companies could not follow suit with a similar ecosystem, but as of right now MS is oddly doing it right.