So, decided to watch them. Wow!
The IGN video was probably the most impressive to me as it is just a chunk of real gameplay (the other videos looked a bit tweaked in comparison with some dialogue changes, careful head movement & steps cut out - for example there no light puzzle on the fabricator in the Valve gameplay clip.) .
The art style and gameplay in all the videos is just great, really can't wait for this. Currently still playing through Walking Dead Saints & Sinners which does a lot of stuff incredibly well but this admittedly does look like another step up with much higher production values.
Chances this comes to Oculus Quest one day even if heavily downgraded?
Anything is possible, but I think it would be really slim chance. I believe that Oculus link is going to be the only way to play on Quest.
Teleportation is probably the default, and what I imagine most people (especially those new to VR will play, at least initially), so starting with it seems fair.
Agreed, I don't think people who haven't tried VR realise how disconcerting it is to be moving like a normal game / using a joystick. I have fully acclimatised to it now but it took a few weeks of playing games with such movement.
Default teleportation with options in the menu is 100% the way to go for a game like this that people new to VR could be playing.