Hi,
i have found a Blogarticel about WebOS, the OS from diverce TV-Manufacturer,
so, why not directly “hacking” TV or use directlyWebOS-Apis for the adjusting or controling Webos over HDMI… and maby a whole Surface for controling a WebOS, maybe KWebOS for Controling (and rooting) the Monitor/TV over Plasma 
So here the German Article :
you could take the translate.google.com for read in your motherlang.
put the url in the one window/frame and open the link in the other window
best regards
Blacky