The new focus mask tool, which autoselects areas deemed in focus, works pretty well. I find the parameters a little obscure (what are the units?) and hate the fact that it always defaults to Auto, but it works pretty well as a first stab, which you then refine.
Adobe rolled out a new preference setting called "Experimental features." In the initial implementation, this is where you'll find the Windows 8.1 Touch optimizations and upscaling for high-density displays.