For now that's what it is, a mockup.
Actually no, it isn't a mockup. It is the
actual GUI code that will eventually be released into an integrated application (with bug fixes of course). A mock up is a simulation or model. This is the actual early development code being released for testing and feedback.
No one seems to cares what other coins are adding
As I explained on the BBR thread, this is because you don't understand what is
actually important. Feature wars and being first to release one feature or another is (obviously, as demonstrated in the real world) not that important. You can rant all you want about XMR not having this or that feature and the reason no one cares is not because of some conspiracy, shill campaign, or whatever sort of paranoid delusion you are always spouting off about. It is simply because no one cares.