Recently I've been messing around with other V-series synths which are of course all very interesting creatures. More and more I think about it, I begin to feel that Arturia should really really think more possibilities to integrate them together with other products. Analog laboratory is step to that direction, but more for live playing and editing, if I'm right.
Because of its already functional step sequencer and very nice physical controller, IMO Spark should definitely have chance to import some V-synths to it, recording and playing synth / bass lines or FX-stuff with its step sequencer. Of course this means lot of work but I think it would be a very wise business move from Arturia. There are so many new customers to having their first Arturia product; wouldn't it be fascinating to know that you could expand your synth with Spark or vica versa: expand your brand new Spark with some special V-synth(s). Think all the live possibilities to make all this with Spark (loading songs with some special Spark, V-synth settings) and no need to mess with any DAW.
And do not of course forget the physical midi outs. Step seq should really be able to send stuff out from physical midi too.