The introduction of the Dolby AC-4 codec marks a significant advancement in streaming audio technology, potentially bridging the gap between streaming and physical media sound quality. In a double-blind listening test organized by Immersive Machines, audio professionals consistently rated AC-4 as having superior sound quality compared to the current standard, Dolby Digital+ Joint Object Coding (DD+JOC). The AC-4 codec can deliver audio quality on par with uncompressed PCM audio while using only 3% of the data. This development is particularly noteworthy as Peacock prepares to be the first streaming service to implement AC-4, although other platforms have yet to announce plans for adoption. However, despite these advancements, the enduring appeal of 4K Blu-ray remains strong among collectors, who value ownership and the permanence of physical media over the potential for improved streaming quality. The test, while promising, involved a relatively small sample size of 16 listeners, indicating that while the results are encouraging, they should be interpreted with caution. Overall, while Dolby AC-4 could enhance the streaming experience, it may not be enough to sway dedicated collectors from their physical media.