They all have pretty similar looking touch controllers that look a lot like the Rift controllers. I would guess that functionally these new headset/controllers are little different to the Rift, just slightly higher res, less cables to plug in, and built in cameras for mixed reality stuff.
These new systems rely on a combination of the accelerometers/gyros in the touch controllers and the cameras in the headset...the idea being that the tracking is as good as Rift/Vive when the controllers are roughly in front of you, but a bit less accurate when they're towards your peripheral vision. Tradeoff being you just have one HDMI and one USB to connect the whole lot up, no cameras/lighthouses and stands required.
Reviews should be forthcoming soon on how good the tracking and ergonomics of the different headsets are. Assuming they don't all suck (unlikely), I can't see the Vive and Rift being able to charge a premium for long, and we'll see HMDs settle at 300-350 and 400-450 with the controllers.
https://www.theverge.com/2017/8/31/16219544/lenovo-explorer-windows-mixed-reality-vr-headset
https://www.theverge.com/2017/8/28/...xed-reality-headset-pricing-release-announced
https://arstechnica.com/gadgets/2017/08/asus-windows-mixed-reality-headset/?comments=1&post=33895093