High-definition DVD question

[justcarol67]

Does anyone know whether OoP will come out in standard DVD format
before it comes out as a high-definition DVD? Also, can you play a
high-definition DVD on a standard DVD player, or are the technocrats
forcing us to follow along with the new technology as they did by
replacing VHS tapes with DVDs?

Carol, who hates being forced to buy new equipment every time
technology is "improved"