People seem to hate on this for one reason or another, but I think it's great if done well. It's not actually "buttonless", it will still have a frame with shapes for something looking like a button, it just won't physically move when pressed. If they make it work as good as their trackpads (which are the best trackpads out there no contest imo) or similar to the solid state home button the iPhone 7, 8, SE2 and SE3 have, I'd say it's better than actual physically moving buttons: the button will feel consistent between devices of the same model (you can get slightly different feeling physical buttons between the same iPhone model or also another manufacturer's phone model because of tolerances), it could be configurable (sensitivity and feedback, like you were able to configure the home button starting with the iPhone 7), it makes the frame more rigid, solid state buttons basically never break, they could have different actions at different pressure levels (with feedback to match) etc.