While there is Google Play Integration, there is no word on how they plan to integrate the corporate intranet - which is littered with thousands of custom applications ranging from payroll to HR to ticket and incident management.
Serious question - surely there are some custom non-web apps but I doubt they'd have released this if they didn't see some large companies who would find it a compelling cost reduction for big swaths of their staff.
Because tons of stuff is on-prem, e.g. Confluence, JIRA, Bitbucket.