Hi-dpi is something we were pretty much done with one-two years ago (modulo per-screen dpi, which we need Wayland for).
> Tell me, who's working on making GNOME/KDE apps look good on KDE/GNOME?
Well, we've developed GTK+ versions of both of our last default looks (Oxygen and Breeze) and tried pretty hard to get to an agreement with the GTK+ guys on the window decos issue - it's true we're a bit disappointed how the latter went. I share your concerns about lack of cooperation, actually!
> But who's going to do that?
The same people who've always done that: You and me. I prefer rolling up my sleeve vs. waiting for a savior ...
For me the metric is simple, really:
- Is the Linux desktop still needed? Today more than ever.
- Is the Linux desktop today still better than one year ago? Yes.
As long as I have positive answers to those, I'll just keep working.