Just curious, now after trying it for some time, do you think is it worth the investment?
For me, definitely. However the applications are just trickling in and support for it is still limited. I think that will change once the Touch is released, at which point it should be at par with the Vive. Currently the Vive has the upper hand (two actually) with hand motion trackers.
I am super curious how's the depth perception involving planets? I.e. when you're 10000 km from Earth, does it actually pop up against the starry background? Do you have a feeling it's really there?
Not to answer for franktalor, but if it is accurate, it shouldn't "pop" against the background at all, since the parallax motion between one eye and the other is virtually zero compared to the scale of planets. In order to make the planet's "pop" would require an eye separation on the scale of hundreds or thousands of km, which would make the planets look toyishly small (which would actually be a neat effect). Maybe there will be options in future releases to increase or decrease eye separation.
In reality, you would have no depth perception when observing planets from space.