That article calls it a "conversion" which is weird, but I guess they're just talking about a new 4k scan.
Star Wars actually doesn't seem like a great choice to show off that new 4K format, especially now that the movie is a hodgepodge of iffy 1970s 35mm film stock and 90s computer crap. You would think they'd go for modern movies and large format stuff. I really hope this means that they're giving up on the awful 2011 version (and if this work was begun when GL was still in charge, it surely would have been that) in favor of restoring the originals or releasing a better final cut. Or both.