Fallout 4 Next-Gen Update: Xbox Release Time
The estimated release time for Fallout 4's next-gen update is around 10am / 1pm ET / 6pm BST on April 25th.
As noted, this is only "estimated" for now as Bethesda has yet to reveal an actual time for it - we're basing this estimation on when Fallout 76 updates often roll out, but who knows what kind of plans Xbox might have in store here.
Fallout 4 Next-Gen Update: Features List
In terms of the features coming to Fallout 4's next-gen update on Xbox Series X and Xbox Series S, the big highlight is new Quality and Performance modes with support for up to 60FPS along with increased resolutions.
Bethesda has yet to reveal any specifics about those performance details - and we don't yet know how they'll apply to the lesser-powered Xbox Series S - so we'll have to wait and see just how impressive they end up being.
"This free update includes native applications for PlayStation 5 and Xbox Series X|S, Performance mode and Quality mode settings, as well as stability improvements and fixes. Experience up to 60 FPS and increased resolutions!"
The Fallout 4 next-gen update also brings free Creation Club content to the game on Xbox (and other platforms), including a quest called "Enclave Remnants", a Makeshift Weapon Pack and a Halloween Workshop.
In terms of PC specifically, there's also now going to be widescreen and ultra-widescreen support, along with various quest updates and stability improvements / bug fixes.
Fallout 4 Next-Gen Update: Xbox One Benefits
Although the Xbox One doesn't get a next-gen update for Fallout 4, it'll still receive a free update on April 25th.
The update includes stability improvements, login and quest fixes for the last-gen version of the game.