If you will create “next gen” desktop, you will just solve some problems of already existing ones and create your own. Maturity of software is far more important, than uniqueness. GNOME didn’t evolve into its current state for no reason.
Translation: no one should ever attempt to innovate on the Linux desktop. GNOME is the epitome of software development and everyone else should quietly give up. If GNOME can’t fix an issue, no one can. Only GNOME has the god-given right to make decisions on how desktops are developed for Linux. There can only be one party. The One Desktop principle. Contribute to your party leader, or else…