Ask a kid who's been issued a Chromebook for school. Everyone I've talked to complains about it being heaving, having a short battery life compared to their other electronics, and being very limited. I know "Chromebook" encompasses a wide array of devices, some with better and worse performance, but they're not a panacea for computing. Most are low performance devices.
There are good ones and crappy ones, yeah. But they sell very well, especially because they're so affordable, so saying Apple owns mobile and Microsoft owns desktops isn't a complete picture.