Interesting Q&A follow-up from last month's NISO webinar: Bibliographic Control Alphabet Soup: AACR to RDA and Evolution of MARC. Barbara Tillett and Diane Hilmann weigh in on a variety of questions.
Barbara Tillett: RDA is not a format. It's a set of cataloging instructions on the identifying characteristics for the things we wish to control in the bibliographic universe. If you still are using an ILS when you start describing things according to RDA, you'd still be using MARC bibliographic records and MARC holdings records (and MARC authority records) for the foreseeable future. [emphasis added]
Looks like the immediate future's not so scary, changey after all!
h/t Notatu Dignum