Shaking up the current situation doesn't seem to be an entirely bad thing. As it stands, the majority of the internet is depending/residing on datacenters provided by a handful of companies. I'm not sure that's a good thing.
Building satisfactory alternatives to Office, Workspaces etc. isn't a monumental task by any stretch. With the sudden demand that you predict, they'll spring up like weeds.
This might be ham-fisted and crude, but in the end I see a lot of positives.
If replacing Office / Workspaces is not a monumental task, why are there only two good options? Workspaces is only just becoming a viable replacement for enterprise because pivot tables are hard.