Whats the 'big screen' mode for non-VR titles like? Is it just like playing games on a big movie screen? Or like a 100inch HDTV locked to your point of view?
You get a choice of view sizes. It's interesting, and it is different, for anyone who doesn't have a really big screen they sit really close to. But there are compromises, chiefly the low res. I personally didn't find it to be an issue, because the game just starts to take over.
It actually really helped my enjoyment of The Last Guardian, for instance. Although the view wasn't 3D, the fact the screen was so damn big really pulled me into the world of this small boy and this giant beast. And then again I was wearing headphones, instead of TV audio... So even without VR, wearing the headset can bring benefits to immersion.
But I'd still never describe it as a selling point, just an additional offering. One thing I was really keen to try though, and never did, was 3D Blu-ray ...