Some companies go years without saying anything about what they're doing. That's software development. It takes time.
Valve is a very different beast, that much goes without saying. Especially now they've got an OS, controller AND set of hardware being worked on, as well as VR stuff, all of which we also haven't heard anything about it ages.
There's a reason it's called "Valve Time", they have a way of somehow being more silent than any other company.