Remember that these were estimates from more than three years ago and before Microsoft completed its acquisition of ZeniMax in March 2021, so there’s always the chance that some of these plans have changed dramatically or been scrapped entirely. But they may provide an early look at some of the games we can look forward to from Microsoft down the road.
Since the Oblivion and Fallout 3 remasters will be on the Creation Engine, they will probably just be the old games with HD textures more or less. So basically what is already possible with mods.
EDIT: Also, I wonder if the Skyblivion project will finally be finished just to get a cease and desist letter by MS because they do their own remaster of the game.