There's no reason voice control can't work with other microphones, including the XBone's bundled headset.
Boogie's worry is about Kinect development losing steam,
but if it is about voice commands, that can be compatable with PS4 as well, so that aspect is unfounded IMHO.
Many usages of Kinect as "auxilliary control" can also be equivalently implemented with Sony's controller light + camera tracking,
so while it would be a BIT more work for 3rd party devs (which the APIs should lessen if they are good),
they could still engage each platform's "motion control" feature with appropriate control schemes.
Actually, PS4 now has MORE built in motion control with 6 axis built in on all units.
I don't get the defensiveness over referrring to the change as "backpedalling", that's what it is: changing previous policy.
The reason they are doing it is because the policy change makes sense and will be of benefit to them (and XBone install base ecosystem overall),
so one can believe it is a good thing they are making the change, while still recognizing that it is a "backpedal".
The term "backpedal" may have an implication of inconsistency and reactiveness, but is not a judgement of the validity of the new policy itself.







