Below are the release dates of previous physical media
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DVD on November 1, 1996; 26 years ago (Japan)
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2K Blu-ray on June 20, 2006; 16 years ago
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4K Blu-ray on
February 14, 2016; 6 years ago
In case they can make it economical
8K Blu-ray could be out in 2026 or later.
This would be the year I'd start looking for
8K TVs as the spec keep changing and that's when I expect streaming services will offer 8K content.