I believe elementary OS is the closest thing to what you're looking for. They're an LLC with the team that focuses on building a good looking UI and a nice UX. Pantheon is the only desktop environment which I wouldn't call outdated in the Linux world and somewhat stable and easy to get (Solus project is attempting to do the same, but I think they just don't have enough man power to pull it off).
I wish them the best of luck but recall Eazel (?) attempting to do this with Gnome back in the day and ended up folding as not enough people were willing to pay.
I agree, been using mint linux (Debian based, borrows some "just works" stuff from Ubuntu) plus the Cinnamon Desktop, is a dream, on high end hardware or not. I will concede though, most people coming from iOS/Mac will want something tailored and curated for them, even though *nix offers unlimited possibilities in customization and software.
