That's the part I don't understand. Why make a standalone product that duplicates existing functionality? And what about AD users, are we just left to chug along with the crusty old step format?
If they really want to revolutionize ECAD/MCAD workflow, they should roll support for solidworks models into the Altium library system and improve AD's solid modelling system, and have a SolidWorks plugin that allows seamless transfer of a complete PCB as a proper SolidWorks assembly from AD to SW and back. Add some change management functionality, and the ability to define constraints interactively between the ECAD and MCAD environments, and you'd finally have real collaboration without forking your user base by duplicating functionality in a completely new tool. That's what the IDX stuff they were crowing about a while ago was supposed to do. For bonus points, link thermal data through the entire EDA/MCAD stack, so you can specify power dissipation of a component in the schematic (from electrical simulation if you're really keen), send that through to SolidWorks for thermal simulation, provide a thermal map to the PCB designer, and report back component temperatures to the schematic designer.
Honestly, between this, the pricing for CircuitStudio, and a lack of responsiveness to some persistent bugs, I'm beginning to wonder if they're looking at killing off AD. If PCBWorks is to be the new PCB design suite, it would explain the lack of PcbDoc support in CircuitStudio.