I use an Android app called Squid[1] for drawing and taking notes on my Pixelbook with the pencil. It is technically an android app, but it's easy to forget that because it just runs so perfectly and it's optimized for tablets and large screens. Same experience with apps like Todoist and a few mobile games I play. It really is a wonderful and seamless experience.

[1] https://play.google.com/store/apps/details?id=com.steadfasti...

Yes, you know what OS its running.

To install a Linux application, you explicitly have to open the Linux container command line (which is Debian Stretch) and run the install commands.

Ex: If I run 'apt install firefox', Firefox will be installed in the Linux container, but will be available to run from the ChromeOS app menu.

Edit:

Also, currently you need to explicitly go in the ChromeOS settings to download and install the Linux container. I'm not sure if this will change or not, but it is not currently included by default.

Sometimes only if you look for small details. The ChromeOS launcher mixes Chrome Apps, bookmarks, PWAs, and Android apps with only a small badge to differentiate if you have multiple of the same app (e.g. Keep Chrome app and Keep for Android).

I think the differences will be stark and obvious to those who remember the world pre-convergence. But a new generation will not know the differences, nor will they care.

For my parents' generation, TVs were a big deal. For me, I can hardly distinguish between a TV and a Radio and a Microwave and a Washer/Dryer -- they all have existed as long as I remember. But I can definitely tell the difference between an app written against User32/GDI/WinForms/VB versus one that uses the Android toolkit versus one in GTK+.

There's been a lot of work over the years to make most applications agnostic to the underlying toolkit and OS, including React Native, Flutter, Unity, Adobe Animate (formerly Macromedia Flash), and so forth.

You can tell but the point is you don't have to care.