Just got my Vive setup and I was pretty blown away. Without having to back track through the entire thread, what is the MUST have software? Played around with the Lab and Google Earth VR:
Assuming:
Tilt Brush
Job Simulator
I'm in the process of going through the available software myself, the free stuff (there is some good stuff there) and what you have already mentioned aside, I was extremely impressed with The Blue.
It's only a short and passive demo of 3 different scenarios but it is also extremely effective showcasing the 3d/in your face VR effect because you are under water and have fish swimming and particles floating close to your face all the time. Out of all non-interactive demos (there is a little bit of interactivity but it's not really worth mentioning) this is still the most impressive to me.
Recently played through Ghost Town Mine Ride & Shootin' Gallery, you need some VR legs before you start that one. It's about 45 minutes of riding minecarts and walking through mine tunnels while shooting at all sorts of stuff, can be scary at times.
I also quite like Space Pirate Trainer, can't play it for longer periods of time but that goes for most VR games.
If your a fan of Portal then of course Portal Stories though it is also rather short.
I have yet to try:
A Chair in a Room: Greenwater
The Gallery - Episode 1: Call of the Starseed
Dead Secret
Final Approach
The Solus Project
Subnautica
RedOut
The Vanishing of Ethan Carter VR
Vanishing Realms
Those are the "bigger" games I expect a bit more from than the other, smallish games and Demos. I got most of those in the Autumn Sale at a discount though so most under 20 bucks.