Ask HN: Connect Laptop to TV without HDMI

Hi,

I am looking to use my Samsung Smart LED TV as an extended display for my laptop but wirelessly.

I am surprised that there is no option available to me except connecting via HDMI wire or purchase a WIDI device (which will only allow streaming videos). I also read a lot at http://www.dlna.org/ but it seems there is no option available.

Does any of you have any experience building a Raspberry PI based device which can help me extend my screen via wifi. If you can guide me to correct resources, I would love to work on this

Naveen