Mirror Ubuntu desktop onto PS3 via wifi (DLNA etc)

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http://askubuntu.com – I'm looking to mirror my Ubuntu destop onto my TV by using my PS3. All done via wifi. Similar to the 'AirPlay Mirroring' in Mac OS X Mountain Lion. http://www.apple.com/macosx/mountain-lion/features.html#airplay Is this possible? How would I go about it. To be clear, I don't want to share movies in particular, rather to send my screen exactly as I see it. (HowTos)