Sony has added the Uncharted: Legacy of Thieves Collection page on Steam. Unfortunately, no new information, including system requirements, is presented there. Nevertheless, since the game was initially released on PS4, it should not be too high.
The release date is planned sometime in 2022. Earlier, Sony announced that the bundle would be released on PS5 and PC in early 2022. The Uncharted collection will include improved versions of Uncharted 4: A Thief’s End and Lost Legacy. However, judging by the Steam page description, multiplayer mode is not likely to be introduced.
The release of the original Uncharted trilogy on PC is not expected yet. But, as Troy Baker said, about 80-85% of players do not play previous games in the series if they belong to different platforms. That is, we can assume that 80-85% of PS4 players did not play the last parts of the Uncharted, The Last of Us, and God of War series with PS3 but immediately started playing new games on PS4.
The fourth сhapter of Uncharted series earned extremely high ratings from players, including the press. The game belongs to the almost extinct genre of big story corridor games with excellent storytelling. So, it is incredible that more players will be able to play it.
As for Uncharted: The Lost Legacy, this is a large addon about a friend of the main character Chloe Frazer.
Worth mentioning, the collection page has also appeared in Epic Game Store.