"From a communication standpoint, it's going to change the game," Celek told reporters.
"Just the way they can communicate plays and get us into the stuff that's pretty cool. It's something I never even thought was possible in the NFL. He has a reason why each play is called what it is. And it all makes sense."
Kelly's formations and pace are expected to be vastly different from those of predecessor Andy Reid, who incorporated the West Coast offense in Philadelphia. The Eagles, who went 4-12 in 2012, averaged just 17.5 points to rank 29th in the league.
"It's different," Celek said of Kelly's offense. "Things change. And I love what Coach Kelly has brought here so far. I can't say that we're going to be super successful. But from a communication standpoint, it's insane."
The New England Patriots under Bill Belichick already use a version of Kelly's high-speed, one-word play calls. Last season, the offense helped New England produce a league-high 557 points.
In addition to the offense, Celek also is excited about the energy level that Kelly has created with background music during practices.
"It makes it fun," Celek said. "When you're not out on the field doing actual plays, it just keeps you going. It's like sitting in a nice restaurant with some background music."