This is what the new Steam interface will look like on TVs and Steam Deck

In parallel with the arrival of a portable PC called Steam Deck, the Steam OS version 3.0 operating system will be launched. It is unlikely that players on Windows will switch to Valve's Linux variation, but part of the Steam OS interface will be integrated into the desktop version of Steam for all users, including those on Windows.

In translation - the interface that will be used for Steam Deck will replace the previous Steam Big Picture mode that was designed to use Steam using a controller - for example on a TV. When introducing the Steam Deck, we roughly saw the changes in the interface design, but now Steam OS 3.0 has been leaked in an unfinished version, so we have concrete interface images for the game database, achievements, store manager, etc.

There aren’t any drastic changes here, but the direction in the design is visible. The Store Manager section is thus largely similar to the changes in the Download section recently received by all Steam users.

Steam Deck UI, it's basically the desktop library just reformatted a bit.

There is no way to access the store at the moment. pic.twitter.com/mI2dgAPpck

— Pavel Djundik (@thexpaw) September 15, 2021

This Steam interface can be used as desired, just like the current Big Picture mode. That is, it will still be an option, so if you don't like it, no one will stop you from using the classic Steam interface made for desktop/monitors, for example on TV.