Well this is a good initiative for sure but in this version it will hardly live up to their marketing claim:
Not only is Cubasis the best app to produce multitrack audio recordings, but also the best app to produce MIDI-based music.
1) As far as I can see, it has only rompler instruments with very few controls (if any at all) whereas Meteor has an onboard synth and sampler. Likewise has Beatmaker 2 an onboard sampler with lots of controls
2) It has only basic audio editing and no chop lab like Beatmaker 2
3) It does not support audiobus and thus multitrack recording of apps like Multitrack Daw does
4 ) It has no automation lanes like Meteor has
So what is it that should make this app the best app for multitrack recording and midi production and worth the price then? The Cubase brand will hardly make it alone. Whether it will be the best depends on future updates then, so I will skip it for now.