I didn't play for very long, but I did notice some better textures and other things from Episodes 1 and 2 that have been added such as light bloom, dynamic shadows cast from your flashlight and Vortigaunts (I started at red letter day so I didn't check the one slave one in the train station) looked like the ones from Episode 2 with the smoother skin.
*edit* The Episode 2 blood effects are there as well. I thought the original blood effects looked better and less cartoonish.
However, there are some bugs with this as well so I'd expect some patches incoming very soon.







