According to the information channel 887, "Phase 1", beginning October 14, entails moving just the English-language Canadian and US network HD channels to the 1000s. Presumably, the rest of the HD channels will be moved in one or more later phases.
Indeed, those are the channels that currently appear in the 1000s in the Guide on my PVRs, along with five of the HD sports channels (CBSCH and NHLH1-4).
The English-language networks still also appear in the 800s, but the program descriptions in the Guide for shows on those channels all begin with a note of the form "CCCCC will be moving to ch. 1xxx." That note does not (yet) appear in the program descriptions for other channels in the 800s (specialty, movie, sports, French, PPV, etc.).