Yes, I know I'm a day late.
Per the arcile written by Borys Kit for Hollywood Reporter:
"Stephen Daldry is Star Wars’ newest hope.
The Oscar-nominated director behind Billy Elliot and The Hours is in early talks to helm a Star Wars stand-alone movie centering on Obi-Wan Kenobi, The Hollywood Reporter has learned."
So the long desired Obi-Wan Kenobi film is finally moving forward. Maybe. A key thing buried in the article:
"Sources stress, however, that since there is no script, no actor is attached."
If this was news about a director and indicated that Ewan McGregor was involved, I'd think this was a controlled leak by Disney. Since we only have the news about the director, I think Mr. Kit just happened to land the a major scoop about Lucasfilm's future Star Wars plans.
The fan base has been clamoring for a stand alone Obi-Wan Kenobi film starring Ewan McGregor since the announcment of the anthology films. McGregor himself has expressed interest in returning to the role. The optimistic appraisal is that Lucasfilm is getting their storytelling ducks in a row before they approach McGregor, if they haven't already. I also doubt that they have a major interest in recasting Obi-Wan Kenobi. Rogue One had Genevieve O'Reilly and Jimmy Smits reprise their respective prequel trilogy roles of Mon Mothma and Bail Organa, it wouldn't make sense to have an older Ben Kenobi plaid by anyone other than McGregor (or, god forbid, a CGI Alec Guinness).
The other option, and all credit to fellow Team Blue Post member Chris Okamura for this idea: What if we're getting a movie with a younger Obi-Wan Kenobi focusing on him and Qui-Gon Jinn? That might be why there's no actor attached.
But all this is pure speculation until we get an official announcment from Disney and Lucasfilm.