I am also voting for iSEM as a native Tabletop device. But iSEM looks like it was not done by Retronyms, so maybe it was not built with TableTop in mind like iMini was.
In the meanwhile, anyone can use the free TableTop Mastermind device to integrate iSEM into TableTop. It works really well, including polyphony, on iPad Air.
I would love to see more Arturia V instruments on iPad, and on TableTop. In fact, there is not one I wouldn't buy at about USD $9.95 - to $14.95. Even just one more from the line would be fantastic. If I had to choose only one per year, I would pick. . . ARP 2600 definitely! Or maybe Prophet?