Very neat! I tracked down a texture pack for either Duke Nukem 3d or Doom quite some time ago. It was very similar. I tend to play the original graphics though, being the nostalgic old fool that I am. As much as I love seeing updated graphics, I love playing the old ones; I did this with the Halo Combat Evolved and Halo 2 remasters, as well as even Mario All Stars, which was awesome but just didn’t quite beat the originals. Again, this is all purely motivated out of nostalgia for me.
If I was playing on a tube tv or computer monitor I’d probably go for original but I have my pc connected to a 65 inch hdtv and the enhanced graphics just look amazing and immersive.