While Yamaha call it a Digital Saxophone, no one in the music business thinks of this as a saxophone. It is many things, and some of them may be helpful to learn, to practice silently or to use the MIDI output to notate melodies, or to play it as a synthesizer, which it is. The difference in this instrument is that it (supposedly) has fingering feel identical to the saxophone. I can tell you from experience that the WX5, for example has the fingering of a saxophone (mostly) but in no way feels like a sax under the fingers.In that case it's DEFINITELY not a sax ...
This is an electronic instrument. I look forward to trying it and reporting back to you all, as a NOT very experienced saxophonist. In this case, it's an advantage that I haven't been playing for years.
It comes out just at a time when you probably are best not looking at the news!