Chromebooks, the stripped-down "laptops" running Google's web-focused Chrome OS, have almost no presence in the market, after two years. But a new report from Forrester Research says these "post-PC" devices could fill a niche, or more than one, in the enterprise. That's because for users who can be well served by online applications, tools, and services, Chromebooks are an inexpensive alternative to traditional laptops. And for IT groups, Chromebooks can radically simplify the costs and time of PC maintenance, upgrades, and troubleshooting.