It's not Elementary
Linux running in ChromeOS gets a bit more functional with each release of the browser-based operating system. It still starts, however, in terminal mode, although Web sites will tell you how to install a GUI (graphical user interface) so that you don't need to type endlessly-long command-option strings at the prompt, such as this one:
sudo apt install qemu-kvm libvirt-clients libvirt-daemon-system bridge-utils virtinst libvirt-daemon virt-manager -y
Now in 2020 it is possible to install VM (virtual machine) software on ChromeOS's Linux subsystem, and then run multiple Linux GUIs. ChromeUnboxed, for instance, shows how to do this with one Linux package at chromeunboxed.com/forget-windows-i-just-installed-elementary-os-on-my-chromebook-and-its-awesome/. I recommend you read the comments to the article to learn about steps the author forgets to detail.
You do need a Chromebook with a powerful CPU, significant RAM, and more than the usual storage space, as a VM typically wants 20-40GB for itself. My Acer runs an i7 CPU with 8GM RAM and 128GB of storage -- about as powerful as it gets these days.
The writer says, "I want to point out that the Linux operating system runs like a champ inside the virtual machine." I found it didn't. Any click I made took Elementary a minimum of three seconds to respond; sometimes the wait for me was ten seconds. After playing with it for a half-hour, I stopped the virtual machine, and then uninstalled it entirely.
I suspect running Windows on Parallels on ChromeOS will be just as painful. There's just too many layers of code at work.