Instead of Skia bindings, probably the effort of building a C++ UI toolkit that has the features he needs and THEN do Java bindings for it would prove more usef

Instead of Skia bindings, probably the effort of building a C++ UI toolkit that has the features he needs and THEN do Java bindings for it would prove more useful for the community instead of tying the UI toolkit to Java. That's kind of what's missing in my opinion, something that does the hard part of UI, integration with native OS controls (eg. open dialogs, etc.), accessibility even with custom UI drawn using 2D primitives, etc. and that would be a great project that would also benefit the author as long as it has Java bindings.