PSVR ( and other VR)

I've tried Oculus Rift \ HTC Vive \ PSVR at SIGGRAPH 2016.

I'd say there are almost no major differences in hardware aspect, they almost share the same resolution. Somehow I got some difficulties trying to correct the focus on Oculus Rift, it's like no matter how I adjust the knob the image is still somehow blurred. The demo is a racing game which I forget the name lol
I prefer Vive more because the controller are just natural to use and fun to play with, don't know how Oculus Rift's touch controller would perform comparing to it. There's a little bit leaking of the light at the bottom the device, but I managed to ignore that very soon. The demo I tried is a Funhouse (much like a circus while you can't shoot things with arrows/guns, whac-a-mole or something like that), and Home (a space exploration demo, which is astounding)
PSVR is more or less similar to the Oculus Rift, but with a much more cooler appearance, but the demo they choose is Rex∞ which is a very old game, yet fun.

Anyway, my opinion is, these devices are the first generation of VR devices, the WOW factor is very huge. The VR contents still aren't that much, the devices are still bulky and heavy and requires a top-tier PC (or a new generation of console considering PS4 Neo) for running smoothly.
But don't get me wrong, VR is really the next generation of experience, it's very VERY immersive. If you don't care all these requirements and have extra hundreds of bucks to spend, don't hesitate, just try it out. Otherwise I suggest just skip this generation altogether.

I just got my Rift in a week ago.  Half of ensuring good focus is in the way the headset sits on your head.  Chances are you had it sitting slightly too far down and needed to tilt it up.  Adjusting the straps properly is also a factor, both in clarity and comfort.  The adjustment slider is more for fine tuning once you've got a good fit.

I don't have many VR games yet, so not a lot of input from me on the experience yet.  Here's what I've tried so far:

Eve Valkyrie is a lot of fun, but the experience reminds me of a more immersive version of one of those arcade pods for Gundam(though the actual gameplay itself is considerably different).  It's more something to pick up and play for a few sessions now and then than an in-depth game to play all day.  That said, the immersion really is amazing, and when I was waiting through the launch sequence, I found myself unconsciously mimicking the pilot's hand movements as he adjusted his grip on the stick.  If CCP ever expanded this to be something more than an arena shooter, I'd definitely be up for that.

Lucky's Tale gave me chills when I started playing it.  It's not the best platformer ever, but the feeling I got from it was the same one I got when I first played Mario 64 and thought to myself "this is how a 3D game is supposed to play."  Everything just feels right about it, and it convinced me that there's definitely room in VR for third person games.

Big Screen is exactly what it says on the tin.  It let's you create a virtual monitor screen with user controllable size distance and curvature.  It's better for some things than others since you're losing a fair bit of resolution, but one thing it is perfect for is playing 2D games, particularly old SNES era and earlier titles that weren't meant to be played on a high resolution monitor in the first place.  Playing Super Metroid on a screen that filled my vision was a blast.  As for other content, anime works out well enough, but live action movies lose too much detail for my taste.  Similarly, trying to play a an even remotely modern game with detailed 3D graphics is a wash.  It's like watching a let's play that someone recorded using an SD camcorder pointed at their monitor.

Comfort-wise, I have had no problems, being able to play for hours with no sense that it was too heavy or unbalanced.  The built-in headphones are good, but I think I like my Beyerdynamic DT 880 Premiums better(which makes sense seeing as they cost me $250).   I have some plans to experiment with creating alternate audio solutions, but I've got to order some stuff before I can get started on that.

Overall, I'm thoroughly pleased with my purchase, and am looking forward to the Touch being released so I can give that a go as well.

Well they're all in the 1 pound range it's more about how it feels on your head. I heard the PSVR feels the best because it doesn't use a typical strap for the back of the head and other little things. At the same time it's not as powerful as the other two head sets. So any headset is win win.