Serious question: why are they doing this if they've been marketing BeyondCorp for years now? Why is corporate network special then?
The network connection isn't the main problem, it's every access to a protected system that would no longer trust the device.
I mean, I can understand defense in depth and not wanting anyway a possible unsafe device connected to the corp network which still might expose some unwanted data (i.e. I imagine a trusted device on the corporate LAN might relax some local firewall rules to make it easier to develop? I'm just guessing, no real idea)