I wouldn't be surprised if in large companies (say >500 office workers) 10% of all office work becomes redundant. Not in the form of each worker getting 10% more productive, but in form of some roles getting eliminated completely and others losing 80% of their workload.
That's been true even for traditionally programmed replacements tho, there are plenty of office out there with a bunch of people banging on excel when everything they do could be automated.
