I don’t get why most comments here are so negative. It’s Linux, if GNOME no longer fits your needs, you can always switch to another desktop. There are lots to choose from!
I am actually excited to see how these ideas will work in practice. I’ll complain after I’ve used it, if it really doesn’t work well. But until then I am quite positive about it. If no one tried to innovate, we would still be stuck without electricity afterall …
Personally I have yet to encounter window management that doesn’t annoy me in one way or the other. I would be happy, if GNOME developers actually managed to come up with a better way of managing windows, similar to how GNOME’s dynamic workspaces changed how I use virtual desktops.