I've been looking at Chromebooks for a while but haven't got one yet. At least once a week or so, Woot offers an HP Chromebook for $199 that includes free 4G (T-Mobile HSPA+) for life. It's capped at 200MB per month, which isn't much, but presumably you'd only use it when not in a WiFi area, which for me at least is very seldom. And it's free. For life. I'd like to use it for couch browsing and travel. Don't think it would suit my needs for much more than that. But it should run faster and hold a charge longer than my clunky old laptop.
The Chrome browser is rock solid, with a great selection of add-ons and extensions. IE has been a train wreck for more than a decade and Firefox had become a memory hog. Chrome is fast, secure, and customizable. Google services are getting better and better at actually making things easier to do and anticipating what information I need and when.
I build high-performance desktop PCs as a hobby. I use the latest build for 90% of my computing needs, which includes audio recording and digital video editing, along with the usual browsing, email, and spreadsheets. I only use a laptop for it's intended purpose, which is casual computing at locations other than my desk... and usually for something I can't do on my smartphone (which is becoming less and less over time). The form factor I like the best for this are powerful tablets with a detachable keyboard dock. But I haven't purchased one of those yet either.
Traditional laptops IMHO are an obsolete design. They attempted to replicate the power and flexibility of a desktop, in a physical package that could not handle the demand. This became worse as people wanted smaller and thinner designs. They run hot, slow, and the screen is too small for my 53 year-old eyes. I'll take my three 22" monitors and a high-performance desktop PC any day.
As for data storage, I agree with a prior post that external drives are so cheap, it's difficult to understand the cost rationale for cloud storage. The reason I think people like me will eventually embrace the cloud is because you want your data everywhere you go. Not just at home. And there's no reason to clutter up all your devices with duplicate data. For my mobile needs, the Chromeback/Cloud concept looks pretty appealing. For my non-mobile, resource-intensive needs, I'll keep building desktops PCs.