High definition 2D graphics, or high resolution remakes of older games?
If you mean the first, there's been at least one game that came out recently that I can name and that's Odin Sphere. A pretty nice looking game that, unfortunately, suffers from looking a bit too much like a Flash animation at a lot of points.
As far as the latter, I can think of two off the top of my head. There was The King of Fighters '94 Re-Bout which was basically a high resolution remake, but all they really did was trace over old, upscaled sprites to maybe a little larger than the Guilty Gear series' sprites with some new 3D backgrounds. The end result was mediocre as was to be expected from that one. There's currently also that remake of Ruff 'n' Tumble that seems to be using the same basic method that the artists for 94 Re-Bout used.