Dynasty Warriors 8: Xtreme Legends Complete Edition is the name given to the PS4 version, which includes the original game and its expansion in one handy package. Take a look through the break.
The assets don't look all that different from the PS3 version, as you'd expect, but in the battle sections there are a couple of instances of multiple large groups of enemies in the distance in addition to the ones the players is tackling; this is kind of a big deal as every Warriors game on the PS3 has suffered from egregious pop-up.
The Complete Edition is also coming to Vita, while the PS3 version is the expansion on its own. You'll be able to import your PS3 progress to the PS4 version, which is kind of cool. Expect all of these in North America on March 25 and in Europe on April 4.