I don't think anyone is recommending a Chromebook to tech professionals (i.e. everyone reading these comments), but for those who need a computer at work primarily for basic office and productivity apps.
The Chromebook stack like a viable option for a very limited use case, likely offices heavily locked into the Google-sphere of web apps, whose daily operations primarily aren't design/production/development.
Any use case that previously involved Thin-clients probably could be replaced with Chromebooks, and deliver as good, (if not better) user experience. Places like large etailers that use almost exclusively browser based applications (inventory / order management, CMSes, shipping services) could easily go this route.
Most people in the world get by just fine with one screen and one desktop – anecdotally, everyone I know who is not in tech or design does...