It looks like we're seeing the first crack as Universal has dropped
support for Blu-Ray. While I'm not sure this is anything official it looks like Sony is starting to lose ground to HD-DVD. Time will tell how this works out but this is certainly not good news for Sony.
Thanks to Solsie
.com for the link.
-Update- Actually, Universal never did support Blu-Ray as they were solely with HD DVD. You can see the initial list of Blu-Ray supporters here
and Universal Studios is indeed missing. - John