The HD codecs are EXACTLY the same as the BRD codec for all the Kubrick movies. In other words, they're identical. So dont be hatin', OP. This should just be called "2001 in HD".
And yeah, its the most impressive HD DVD/BRD yet. Sure, theres newer stuff which actually looks better (ie. Pirates on BRD, Transformers on HD). but those are 2007 movies, and products of the digital age. 2001 is 39 years old.
These Kubricks have made the purchase totally worth it.