@ Vasot
Microsoft is already working and waiting for a larger and better Media disk from the Bluray according to the rumors
In what ways better?
More data storage than multi-layer Blu-Ray disc? (Currently up to 200 GB per disc)
Faster? How much faster loading than the fastest Blu-Ray PC drives available by then?
Major innovations like constant reading speeds throughout the disc and scratch resistance are already there with Blu-Ray. What makes you think a new disc format would be able to provide to beat a by then already well established Blu-Ray format? HDTVs will likely support 1080p and 7.x audio, so even higher specs seems to be overkill for 2012.
What would be the incentive to drop Blu-Ray disc for another disc format?