its better you look it up yourself if you dont want any spoilers.
Basically you get to pick and choose racials as you want now.
pretty sure ive seen it on BOLS and 4chan
Okay, to push the discussion forward, I'll post what I do know in the form of a copy/post directly from Dragon+.
Tasha’s Cauldron of Everything includes a new way to customize your character’s origin. This rule allows you to take the ability score bonuses of your race and apply them however you like, based on the origin that you imagined for your character. The same rule also provides guidelines on changing certain other elements of your race. It’s all about digging into the fact that adventurers are exceptional. The race options as written in the Player’s Handbook are Western high-fantasy archetypes. If you want your character’s backstory to diverge from that archetype in significant ways, there are now some very simple rules to make those changes. Many players embrace these high fantasy archetypes. Yet for other players, having their character differ from the archetype is what draws them to that character. And we want to make sure that our rules make it just as possible to take that path as to follow the archetype.
From what I can tell, the intent is that this optional rule is just a method of legitimizing a house rule that some DMs have already allowed for games run in AL, given that the player's PHB+1 includes the AL. To a lesser degree but still important, also to facilitate it without the need for house ruling it - a RAW, balanced-by-WotC rendition.
Given that it is an optional (variant) rule, and that it appears to only be for Ability Scores, something people have been vocal about wanting for a while because of build diversity, I'm struggling to see how this bodes ill for anyone. I've seen no evidence that their intent was to water down racial diversity, and they even made a note that it's specifically for a different type of fantasy that some players may want to explore.
EDIT: to address a specific issue, since this is RAW and potentially AL legal, I really doubt a free feat is going to be on the table for a feature any race can take. Wizards may want to be progressive, but not so much that it ruins the balance they've achieved in AL.
Further, we've seen enough of the statistics in character generation for BG3, to round this back to topic, that we can safely assume this variant rule is not in effect - at least not by default, or not yet.
