I think powerbook will render another bump in the graph (mostly because of additional sales to already established users, and because the joining of people from "other camps"), but I don't think a G5 would have as big effect. But maybe it will. 
But growth in sales doesn't come from growth of the total "market" (that is probably shrinking), but from already established users getting a second (or indeed a third) copy for some new type of HW they like (like me having a license or Pegasos2 and getting another for Mac Mini because that HW is so much better), as well as people from other "camps" either migrating or "getting both". I think the latter will increase! 
I have MOS 2.0. But I am going to wait for last in the line of MOS hardware : The powerbook.
I dont want to throw away money on the mid range hardware\license.
sorry to see this downgoing spiral
