More comments at ScreenRant:

"This story is true. I work for a conversion house in Hollywood and my boss had meetings with a high up Lucasfilm executive earlier in the month. And for those that think this was just about Star Wars, it wasn’t. They’re converting the films to 3D. They may not announce it next month though, The goal was to make it a surprise an d Blue Sky Disney spoiled that for them. They may wait for a while to announce it, but that Lucas spokesperson denying it is total PR."

"I too want to add a little bit to the validation of this. I work in LA and know quite a few people in the industry. When I went over to a friends house last week, he mentioned that some Lucasfilm big wigs were at his work to check out the 3D they have for conversion of some films. I said the Star Wars films and he smiled and said Nope. His wife asked a question and we changed the subject and didn’t get back to it. But this makes total sense."