Most people dont care about Hi-def and its more important for them to have acceptable (dvd kind of quality) at home comfort (without even need to go out for shopping) at a very low cost.
Besides Hi-Def movies are not common in Netflix now, but neither are bluray movies among all those dvds. The hi-def library will grow as users have greater bandwidth and demand increases.
Playstation 5 vs XBox Series Market Share Estimates
Regional Analysis (only MS and Sony Consoles)
Europe => XB1 : 23-24 % vs PS4 : 76-77%
N. America => XB1 : 49-52% vs PS4 : 48-51%
Global => XB1 : 32-34% vs PS4 : 66-68%