I just saw the presentation on GS site.
What I figured out is, that freeform is C4Ds modeler with an automated function of import-export from Archicad.
Quite interesting demo but it avoids presenting any plans or sections from the building.
What I don't know (in case you watched the demo) is what happens with that freeform envelop on plan. To be more specific the example is a 4-storey building covered with an envelop. The envelope is saved (and imported) as a GDL object so it will not be visible as needed in each floor plan (or is it possible?). IMHO this is not a freeform but an AC problem. There should be a way to automatically create a plan for each level of the object.
Anyway freeform looks like a very promising move from GS and Maxon.
Petros
ArchiCAD 22 4023 UKI FULL,
Archicad 21 6013 UKI FULL, ArchiCAD 20 8005 UKI FULL
iMac Retina 5K, 27-inch, 2017
4.2 GHz Intel Core i7
32 GB 2400 MHz DDR4
Radeon Pro 580 8192 MB