Lik's prints go way beyond the sheer fact that they're large. The precision and detail on those large prints is nothing short of amazing. Combined with the color reproduction on that "special" paper, it's an experience to the senses that goes far beyond just looking at a large print.
A significant portion of that "POP" is also attributed to the face mount Acrylic.... which is a relatively expensive process.
I'll add that Peter Lik wasn't one of those "right place at the right time" guys. I vaguely remember his success story and I think it included many failures before starting fresh with the best of the best of everything. He doesn't use a top of the line Canon or Nikon, he uses a 60+ MP Phase One MF back with an Alpa body along with the absolute best lenses. He doesn't just go out to a good location and setup a few shots... he scouts the locations for weeks, sometimes longer, looking for the best angles, the best times of day for that location, and making sure the weather is cooperating. He doesn't go out looking for the best printers either. He does all of that himself (with his peers of course). He has everything done in house, from start to finish. He doesn't manuf. his own paper though, for that he uses Fuji Crystal Archive Pearl Paper which does help to make the colors pop... but it also attributes greatly to the "back lit" look that is so incredible to look at in person. The prints truly look back lit and anyone that has ever been to his gallery has come out saying the same. To make the colors REALLY pop, every print is face mounted to Acrylic. This process is demonstrated here:
Lastly, he doesn't even seek out the best frame designer. He designs them and has them made in house. He only seeks out the materials, which are generally rare or exotic woods, some bamboo, etc. If you've ever been to one of his gallery's, you'll also know that he takes this a bit further by designing EVERYTHING in them down to the floors and the very unique furniture.