OTA updates are out, apparently… Maybe not forever, but, citing a desire to be consistent and reliable, as well as the ability to make a full phone backup when tethered, the current operating system will only support USB updates.
… carriers will, in fact, be able to hold back updates to some extent.
Joe Belfiore confirms via Paul Thurrott’s SuperSite for Windows:
Carriers could in fact block updates to sell you a phone.
No OTA updates. Updates can be blocked by carriers. That doesn’t sound good at all.