In a security paper published in December 2014, Google outlined its plans to make all of its Corporate data available from anywhere on the public Internet.  The shift would eliminate the distinction between the private corporate network and the public network.  It is essentially an admission that the corporate firewall is a largely antiquated security device and that future network design will avoid it altogether.
The paper is a fascinating read that documents how a device- and user-based authentication system will replace such traditional security features as the VPN.
This is likely another area in which Google’s architectural vision of the Internet will likely become the dominant model over the next 5 years. It will be interesting to see how this approach finds its way into the enterprise and eventually small businesses.
It is also provides a fascinating window into how Google rolls out new technology solutions and architectures internally.