The adapter is due to release on October 20th for $25, but the caveat is that it will only work for users that have upgraded to Windows 10.
Depending on your set-up, the Wireless Adapter could end up being a bit of a godsend. As any tech savvy person can attest, wires are both plentiful and messy, and having one less to deal with is always a good thing. Plus, if you aren’t planning on investing in the Steam Machine, this is a cheap alternative for creating a console-like experience with a desktop PC, especially if you can run your computer off of your living room TV.
While you could simply buy a Steam Controller, there are no guarantees that it will be able to outperform the Xbox One controller, which is arguably the best controller on the market right now.