I think part of the reason that it might be different this time round is because using web technologies for desktop applications gives access to a much broader

I think part of the reason that it might be different this time round is because using web technologies for desktop applications gives access to a much broader pool of UI/UX talent to help build something that works well and looks nice. Applications built with web technologies are already looking noticeably better than anything you get with a cross-platform UI toolkit without putting in a lot of effort.