Since no-one has released any details of the P6 features, how can anyone possibly answer this question properly? I would guess that P6 will retain the pz3 format as P5 did. Previous word from Curious Labs was to the effect that P6 would concentrate on improving usability rather than features (and not before time either) but this remains to be seen. Considering that e-on have done nothing to improve compatibility with P5, not even in Vue 5, I greatly doubt they will bother with P6. Not even P4 imports are fully supported (reflective materials are screwed up).