It does appear to be the start of something that several of us have been talking about for a while - the synthesis of arranger AND workstation features, with an emphasis on contemporary urban styles.

I guess that Yamaha, after messing up on the perfectly good concept of the DJX, want to test the waters again for an inexpensive keyboard that makes performing hiphop and rap as easy as we find sambas! Perhaps, if the market reacts favorably, we might see a 'trickle-up' of the concept, as most modern high-end arrangers are woefully short of features and soundsets appropriate to urban music.

But...... I am sure, as we delve deeper into it's OS, we are going to realize that many of the features that we take for granted (extensive chord recognition, for instance, along with bass inversions) will have little use in urban music, and only the younger (at least at heart!) of us will find this of any use.....
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An arranger is just a tool. What matters is what you build with it..!