During the Square Enix E3 2021 presentation, the company announced the Final Fantasy Pixel Remaster series, which are remastered versions of the first six Final Fantasy games. It is not a set of all six, but rather, six individual games that will appear on mobile devices and Windows PC through the Steam storefront. There is currently no release date.
You can view the short teaser trailer for the upcoming series here:
Players will need to buy each game separately, which allows them to pick and choose their favorite one to own. This is not the first time that Square Enix has remastered the earlier Final Fantasy games, but they included changes such as updated sprites or a slightly remixed soundtrack. The Final Fantasy Pixel Remaster series appears to contain faithful ports of the original games.
Aside from their E3 presentation, Square Enix will also hold a live-stream to provide news and more information regarding Final Fantasy XIV. The 14 hour long broadcast was originally supposed to air in February, but was postponed due to the pandemic. It will air on July 9, 2021 from 6 PM PT. They will only offer Japanese audio.
Final Fantasy Pixel Remaster will appear on Windows PC and mobile devices, with more details coming soon in the future.
