What they are demoing here is a new piano roll where every track is a note, the root note is marked with a special color so you know where you are, and you can punch notes as you would do in a daw. With the jogwheel you can go up and down the piano, covering several octaves.
Combined to this piano roll, there is a new chords and bass feature, where you can build chords of up to four notes, and then you have a the bass that you can sync with. There are a bunch of fills that offer starting points for chords and bass.
These features also work for MIDI mode. A nice feature there is that you get a visualization of the note length if it covers more than one step.
Please keep in mind that this is just me trying to explain the features that I see. I haven’t got a marketing briefing, I haven’t got to play with the features myself yet, and I might be missing and mixing things. I hope this makes sense. 