It does a bit more than a southbridge, but it does take over all of the functionality that was traditionally in the southbridge. It's more like a cellphone architecture where the CPU is a slave to the black box that actually boots the device.
This is exactly the sort of vendor lockdown/lockout on a PC that people have been warning us about since TPMs and signed bootloaders started appearing on cell phones.
This is exactly the sort of vendor lockdown/lockout on a PC that people have been warning us about since TPMs and signed bootloaders started appearing on cell phones.