@sverzegnassi I'm sure people would be willing to donate money to the project if you keep the convergence vision and otherwise they may not. I love this vision and when I have money I will contribute and I will definitely help test Unity 8 on desktop too!
Here's one person ready to pledge cash via Patreon if you commit to developing Unity 8 (on desktop, presumably): https://disqus.com/home/discussion/omgubuntu/make_gnome_shell_look_exactly_like_unity_7_with_this_theme/#comment-3344454071