Did the attention that my little April 1st  post drew help set things in motion a little earlier than planned?
It’ll be denied, it wasn’t seen, and it can’t be proven, it’s just that the slides and the video look a bit rushed, but anyway, on a just released Delphi 64 sneak preview page  on the Embarcadero website, there is a now a “join the beta” link, were you can apply for the beta. However the beta isn’t open, and Delphi XE users will apparently have priority.
As for the preview keypoints themselves, Marco Cantu  has an executive summary.
It seems the beta will be under the usual NDA terms, so it may be some more time before more details filter out.