The ratio of vendors focused on iOS products comes as no surprise to Ezra Gottheil, an analyst with Technology Business Research. He expects to see lots more iPad cases and keyboards come out of the expo.

"Clearly, it seems the iPad spawns peripherals at an enormous rate. I expect there to be more and different and more interesting ways to hold, store, etcetera, iPads," Gottheil said. "It looks like people like to buy their iPad accessories."

There are also the programs that run on those devices. "I always find it valuable to see what new software is out there," Bajarin said. "I see a lot of emphasis now on the software side of things."

Kent added that the might be too new to have a significant presence at this year's show. There should be plenty of developers and programmers on hand, however.

"One of the interesting dynamics of the show is that you get to come and get a demonstration of the software product. In the Mac market, great programmers are rock stars," Kent said.