An article on kotaku stated that the steam box piston is going to come out in the US holiday season with the price tag of $1000
http://www.kotaku.com.au/2013/03/the-first-steam-box-will-la…
This bring up many questions, is it worth it, will it replace my console/pc, what games will it have?
If you pre-order steam box before March 18 you will save $100.
So what do you think? At the moment i'm sitting on the fence not sure if this is going to be another PS3 incident with the pricing. That being said the steam box will have more cheaper games, frequent sales and is made by a company that made some epic gaming moments.
In a word: no. This is for people prepared to pay a premium over a pc for something that just works.
Console yes. PC unlikely.
You can check right now (Linux steam games). I expect most of the valve catalogue will be added.