alt Hacker NewsWoooah that's a long way from 'gaming works on linux' to 'this is now suitable as a general purpose mobile OS'
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There are more details that make me believe that linux as mobile OS is more feasible in near future. Apart from the Valve&SteamOS push, the one notable phenomenon that I see happening is retrogaming. In retrogaming handhelds ecosystem there are now many devices with form factor close to phones (they often literally use screens from older iPhones, etc) that are running on Linux or in some cases provide option to easily switch between Android and Linux. For example on Anbernic RG35XX using Garlic OS there's a toggle in the UI to switch between Android and Linux. Similarly Retroid Pocket 5 allows switching in the bootloader menu.
As a separate point, it seems quite feasible to run Android apps in VM on Linux based phone and make the experience fairly seamless. Something like what Waydroid provides.
Linux has all the pieces. Other commercial vendors like Jolla have put it together before: https://en.wikipedia.org/wiki/Sailfish_OS
There are open UI shells from KDE and GNOME, multitouch gesture support, Android emulation... it's all there.
Linux has been able to serve most non-gaming use cases for over a decade now (source: I've been running the OS longer than that). The one thing it used to not be able to do was play games ... and now it does that.