The Steam client has always looked bad on high resolution monitors, displaying very small text and pixelated graphics, although it seems that Valve has decided to correct this error and use the 2X scaling for Linux distributions, promising high-resolution text and 4K-friendly graphics.
Users with this new update can force 2X scaling using the command "GDK_SCALE = 2”When launching the application. If you don't like how it looks you can always go back to normal 1X scaling using a similar command "GDK_SCALE = 2". For now, an option has not been mentioned in the interface that allows you to select the scaling.
Additionally, support for 4K monitors, this beta update includes an enhancement for window resizing interactions with the window manager. In addition to addressing an issue that caused some computers not to shut down due to having the client open.
New Steam beta, reduces CPU usage and improves support for Vulkan-based games
Valve continues to improve support for Vulkan-based games and today's beta resolves an issue that caused games using this API to unexpectedly close or freeze.
On the other hand, the CPU usage when resizing the client window. In another section, the mechanism that allows installing sets of backup files or disks has been improved, to avoid downloads as much as possible, also a problem that caused workshop objects to be downloaded in each session has been solved.
There are also changes in Windows and MacOS. Microsoft's system has received support for HiDPI monitors and better multi-monitor handling. In MacOS problems with the keyboard and the Big Picture interface have been solved, if you want to see all the details of both systems you can go to this link where you can also download this new version of Steam for any of the three systems.