I hope Ring radiator tweeters aren't the future. Since I don't use tweeters at all. LOL
Infact I never plan to use them again, unless my upper frequency hearing gets so bad to where I have no choice but to bump up the dBs in this area.
Look at where the heart of music is on this chart. I've discovered myself some tweeters add artificiality to the music in certain cases.
Musical Instrument Range Chart . If your speakers can't get this part of the frequency range right. Who cares about a tweeter?
If you listen for overtones even more than you listen for the actual notes, you begin to care about a good tweeter very quickly.