It's a controller with Xbox layout and DualSense features. If you look at Valve's latest news, Xbox controllers are the most common on PC. So, I guess they want to sell these to those users maybe? Butit doesn't have hapticfeedback, that's a bit disappointing.
Personally, I won't buy anything without trackpads. I want a true Steam Controller 2, the first needed an additional stick and a proper dpad.
Capacitive analog sticks usable for enabling gyro, and four (afaik) fully Steam input API rebindable extra buttons, two on the back, two in front.
Also 1/4th the price of a DualSense Edge (which I believe is the one with the two back buttons?)