Blu-Ray vs. 4K: How Are the Two Formats Different?

While Blu-ray replaced its predecessor, 4k is currently the dominant standard for HD viewing. Neo-Online gives a comparison of the two.

Archimago's Musings: 1080P Blu-Ray vs. 4K UHD Blu-Ray: The Prestige - Modern 35mm Filmmaking

2+2=4K: Getting UHD on Track in 2017

Best 4K Blu-rays - CNET

Should You Buy a Blu-ray Player?

Archimago's Musings: 1080P Blu-Ray vs. 4K UHD Blu-Ray: The Prestige - Modern 35mm Filmmaking

Chart: DVD & Blu-ray Are Quickly Spinning Out of Fashion

Oppenheimer - 4K Ultra HD + Blu-ray + Digital [4K UHD] : Cillian Murphy: Movies & TV

Format: 4K UHD Blu-ray. Two-disc set. © DirectToU LLC.

Clear and Present Danger [New 4K UHD Blu-ray] With Blu-Ray, 4K Mastering, Ac-3

Blu-ray vs 4K: A Comprehensive Comparison