Didn't Uncharted have 2048x2048 resolution textures with up to 8 layers? (including reflective for wet effects etc)
And I really can't find very many repeat textures anywhere in the game, to be honest. That's one of its biggest strengths when it comes to textures. They are unique, high-res, and beautiful. I don't know about clever blending effects to create even more unique looking textures from less original data, but it doesn't look like they've done that a lot. In an interview Evan Wells also mentions that part of the reason the game wouldn't fit on DVD is the hi-res textures, which would have to be toned down (total game size is 22Gb, with no repeat data).
I could only find the way the texture streaming is handled on the PS3 in the tech-notes they released some time ago, streaming them from BluRay to HDD to memory, with memory defragmentation, a solution which allowed them to have much higher quality and varied textures, they claim, as well as being extremely easy to implement (they say it took them 3 days and that all developers should be using this technique on PS3)