The problem is that the Play store and Linux environments on ChromeOS are both run in VMs.
On a machine with good specs, this is perfectly fine. But when cheaper ChromeOS devices ship with 4GB of RAM, older mediatek APUs, and emmc instead of SSDs, it's just an outright bad experience.
If Google starts pushing Android Desktop as a replacement for ChromeOS, I think that could be interesting. Being able to run the Play store without the overhead of a VM will make Android potentially a much better experience than ChromeOS.