Google has shut down the "app" section of the Chrome Web Store for those platforms, meaning you can't install Chrome Apps anymore. Once this functionality ships (roughly targeting mid-2018), users will be able to install web apps to the desktop and launch them via icons and shortcuts; similar to the way that Chrome Apps can be installed today.
If you're wondering whether you'll miss out on much, don't worry: as Ars Technica noted, many Apps were essentially little more than bookmarks for webpages, with the added benefit of being able to access them from various parts of Chrome's interface. Admins can also restrict which browser extensions can be accessed by users - an enhancement that will appeal to system administrators and further boost Chrome's enterprise credibility.
Google told developers via email the Chrome team is working to enable Progressive Web Apps (PWAs) that can be installed on the desktop.
The blog post reads: "Chrome Apps will be removed from Chrome Web Store search & browse functions in mid-December 2017". Chromebooks are already capable of running some Android apps and apps on the Chrome browser would seem redundant. "We will be removing support for packaged and hosted apps from Chrome on Windows, Mac, and Linux over the next two years". These apps are installable and bring features like push notifications, immersive full-screen experience and more.
Another great thing about Progressive Web Apps is that it's not exclusive to Google's Chrome web browser because it uses all existing W3C (World Wide Web Consortium) standards. They already work on Chrome for Android, so once Google is done here, PWAs would be the only Chrome app type to work across desktop and mobile.
Google is now looking forward to bring the Progressive Web Apps (PWAs) to the desktop.
With this new web portal, users will be required to login to remotedesktop.google.com and connect remote devices.