Broad view, the mode that transforms Steams interface into a more console-like style much better matched to TVs and controllers than displays and mice, may not be long for this world. According to austinp_valve, a Valve worker publishing on the Steam neighborhood forums, the plan is for the new UI from the just-announced Steam Deck handheld PC to change Big Picture mode on the desktop version of Steam also.
Valve announced Big Picture mode in 2011 and launched it the following year. The mode formed the basis of the UI for SteamOS, the version of Linux that delivered on console-style gadgets that belonged to Valves ill-fated Steam Machine project. With the Steam Deck running a brand new variation of the os called SteamOS 3.0, it makes good sense that the redesigned UI would make its way back to the PC customer– especially considering that Big Picture has felt outdated for quite some time.

When the new UI will make its way to existing PCs, valve isnt offering an ETA for. The Steam Deck is set to start shipping in December, though the level of demand has meant that brand-new orders are being pushed out to midway through next year.

SteamOS 3.0 on Valves Steam Deck.