Surely one can blame the ecosystem; but still the conclusion does not change, and as a comparison, tablets and phones had a more successful approach at adapting or modifying the ecosystem and become usable.
You cannot use an arm chromebook as laptop because of lack of storage, applications, limited options to connect peripherals (no drivers for anything except storage). No way to print that occasional document or boarding pass (unless you have another computer or perhaps network enabled printer); no way to scan a document. The samsung had an SD slot (this one does not); but you could not show videos from your camera because of unavailable codecs (and no way to install them, despite plenty of android apps for arm that play the same formats).
Casual browsing also fails a lot because of unsupported codecs (flash, silverlight); a lot of chrome extensions do not work for arm. Apps, almost non existing.
Compared to a tablet, you get a keyboard and the ability to display multiple windows on screen; but in exchange you lose almost every other sensor or peripheral (accelerometer, gps, camera, light) which make the device useful.
Now if there were at least a sandbox to run android apps, one could (temporarily ?) address the lack of applications.