As Sebastien says in this video, at NAMM, the MatrixBrute rather overshadowed all else from Arturia, but the KeyStep was also a product announced at the show. Designed to be an instant creative tool with polyphonic sequencing, CV and gate out too, you can throw down something when combined with other sequencers, in this case the BeatStep Pro, but the KeyStep also speaks Korg Volca sync - as will the BSPro shortly.
While chatting to Sebastien, it does seem like these sequencer products have a firmware life extending into the future, more features to come, which is encouraging.