But as you told the SMP 3.0 is in ramp up phase and to my knowledge it does not support MBO development.
In latest release of SMP 3.0, it is an unified product for SUP, Sybase Mobilizer (for B2C based apps) and syclo agentry.
Yes, from SMP 3.0 onward, then will not be any MBO development work. Everything will be based on OData concept.
If you have built your iOS Native app based on MBO, then you may have to redesign, redevelop the app which i believe brings huge effort.You have to migrate project to OData. You can read an interesting discussion R.I.P MBO? for more understanding.
Rgrds,
Jitendra