Acer is only one of 5 companies making these headsets.

Those 2 headsets ARE mixed reality ones. They can operate as VR or AR headset. 
They both have 2 sensors (front right and left) and uses the same technology for motion tracking and space recon. than Hololens which offers a real sense pf space and positioning in your room.  

I pre-ordered mine by the way and I have been following this for a while.
https://blogs.windows.com/buildingapps/2017/05/11/windows-mixed-reality-dev-kits-available-pre-order/#4dZzEqqCtxa6HXZi.97

I also have an Hololens which is fully unthetered but I think those are still pretty neat (because they can do both and are cheaper) even if the immersion will not be as good as Hololens and holograms. Just because of the black for instance which a problem on Hololens or the fact that you can turn it in real VR headset if needed 

Looks like I can put my dick in that controller in about 5 different positions.

All I see is this.

the LCD screens might mean these low cost headsets are more ment for designers than gamers as OLEDs have much quicker switch times enabling "low persistance", which prevents the screen from looking blurry during turns

in games there usually are many situations that require the player to quickly turn their heads to face a new threat/situation

How can they operate as AR headsets if there is no way to see your surroundings while using the headset?

https://www.theverge.com/2017/5/11/15627374/microsoft-windows-mixed-reality-hands-on

I was most surprised by the actual experience of using this Mixed Reality headset. I was expecting a HoloLens setup, but it’s literally just virtual reality. You lift the visor to see the real world, but there’s no mixed reality here. It’s confusing that Microsoft has opted to call these headsets Mixed Reality. Microsoft has shown demonstrations of where these headsets map real space and putting virtual objects onto pass-through video, but I wasn't able to try this experience.


http://www.techradar.com/reviews/acer-mixed-reality-head-mounted-display

To be clear, the Acer HMD’s cameras cannot deliver a live view of the natural environment through its viewing lenses. Those cameras are purely for positional tracking, delivering Microsoft’s spec for its 6DOF, or six degrees of freedom, technology.

This, essentially, makes the Acer HMD a virtual reality headset, albeit the lightest and sharpest one we’ve tried yet.

It’s a bummer because it’s, to put it bluntly, missed potential. It also puts Microsoft’s definition of “mixed reality” into question. While we may expect mixed reality to “mix” the real and virtual worlds, much like the existing HoloLens does, that’s not what Microsoft is expecting from these devices. At least at first.

What does MS mean by mixed reality? I'm confused.



Btw:, it seems to me that this is the continuation of Room Alive

https://www.microsoft.com/en-us/research/project/roomalive/

RoomAlive is a proof-of-concept prototype that transforms any room into an immersive, augmented, magical entertainment experience. RoomAlive presents a unified, scalable approach for interactive projection mapping that dynamically adapts content to any room. Users can touch, shoot, stomp, dodge and steer projected content that seamlessly co-exists with their existing physical environment.


http://www.cnbc.com/2017/04/28/microsoft-mixed-reality-first-look.html

I was able to walk around my virtual reality apartment, too, visiting different displays on the walls. In what appeared to be a small sitting area, for example, were three other screens. I looked into the room, pressed a button on the Xbox controller, and was suddenly teleported. Here, I had one display showing the weather, another with Microsoft's Edge web browser, and yet a third digital monitor with access to email. It was a digital office of sorts, and I spent some time scrolling through NASA's website as if I was looking at a real computer screen.

But why?


Except without the augmented part and a lot cheaper (no need for multiple projectors and 6 Kinect sensors)

Who are the other 4?

You need to see how Hololens works to understand why (not the holograms but how this thing knows your surrounding so well (every wall, chair, table, etc...) :). It simple amazing. I do not think people understand that about Hololens when they never tried it before, it is one actually the most impressive thing from this device and the new headset are going to use this technology.

The sensors in Hololens is like nothing in any other VR headsets. It knows everything about your surrounding and while not "seeing" your surrounding may seem weird. Using my Hololens almost everyday, I can tell you that the surrounding awarness makes a huge difference and you can really "map" your office (or whatever room you are in) and replicate it in 3D. At the end, it is another experience than simple VR (hence for AR) because you can move around, put stuff on any "existing" Surface, the app can even use the surface (for instance if you have a chair a NPC will seat on it), etc... I really believe this is a difference experience at the end.

Ah, so it should still be able to render a model of the room you're in and use that in VR?
That would help with knocking over stuff while playing in VR and maybe games will smarten up and not ask me to place / pick up stuff inside the armrest of my couch :) Though likely it will just tell you to get clear of real life objects first. It seems more practical for non gaming stuff, like Room Alive or usage at the workplace.

It looks soooooooo weird that I like it!