Digital Foundry goes hands-on ahead of today's release:
We're still a good few months from Uncharted 4's full release in 18th March, but as a milestone, this public beta already shows huge progress. Certainly, its performance can be shaken once several major relics are used in concert. However, most of the time it runs undisturbed at the 60fps line, and we expect Naughty Dog could achieve an even tighter seal on its goal by release. It's simply a matter of fine-tuning at this point, where performance is largely in a very good place as-is.