See, the funny thing is that if this dcp they're showing tonight is from a new 4k scan/master of the o-neg (which, as we've discussed over and over again, is conformed to the '97 version) and it hasn't at all been "re-altered" to reflect the changes from '04 and '11, the only real difference between this screening and other authorized screenings of ANH that happen all the time is that one is an actual 35mm print and the other is a 4k dcp.
The way they're raving about how good those 20 minutes looked, it certainly sounds like this is the new 4k transfer and not the old one from Lowry.