Final Fantasy I, II, III, IV, V and VI got new remaster versions which include new changes such as music remixes, changed/improved visuals and new animations (however lacks some of the additional content that the GBA, PSP, Mobile/PC versions of respected titles have had).
The games were released on Mobile and PC about over a year ago or so - I bought them all on Steam but now the ESRB looks like has them listed for both PS4 and Switch - unfortunately there's no sign of an Xbox version which is a shame.
I'm planning to double/triple dip on them on both PS4 and Switch.
Hopefully we'll see a Xbox version in the future since it seems like SE does slow releases for their games (like KH and some of the other FF games that came out in the past year or so).
Source 1: https://www.gematsu.com/2022/12/esrb-rates-final-fantasy-pixel-remaster-series-for-ps4-switch
Source 2: https://www.reddit.com/r/FinalFantasy/comments/zjtbub/final_fantasy_16_pixel_remaster_rated_by_esrb_for/