This video, via Discchord, takes a look at the current state of the art of combined sequencing & synthesis on the iPad, with Genome, Sunrizer, Bassline, Molten & MoDrum.
While the demo would be pretty basic if it were being done on a desktop workstation, the development of this level of connectivity between multiple music apps on iOS is very new. See the August posts on the Open Music App Collaboration Manifesto and the the future of iOS music. An impressive amount of work has been done in getting iOS music apps working togethering in the last month and a half.
What do you think of the current state of iOS as a music platform? And does the platform need more desktop DAW capabilities, or do you think it needs to evolve in a different direction?