The demo was filmed off the NAMM Show floor, with direct audio, so it offers a better preview of the audio possibilities of the JD-Xi than most other videos.
The Roland JD-Xi is mini-synth that offers an analog monosynth, dual digital synths, 808-style drum sequencing and a digital effects section. It’s the first in a planned JD-X series of hybrid analog + digital keyboards.
The Roland JD-Xi is expected to have a street price of about US $500. See the Roland site for details.