All the best of the original 4 THPS games, plus great graphics and a more diverse soundtrack. The Create-A-Park feature is more customizable than it's ever been, as are any custom skaters you care to create. The ability to compete with others online and achieve spots on the global leaderboard in the ranked skating game mode is a sweet addition (obviously necessary in order to stay current and relevant with the rest of the gaming world, but a great move for THPS, nonetheless).
Pretty much a perfect remake, in my opinion. I was a huge fan of the old ones, and especially spent countless hours immersed in THPS 3 and 4 throughout my childhood and adolescence, but this is so much better than all of them.