"Well, I think we haven't gone into a lot of detail. I mean, we've got 23 third-party games on display at the show," he told Digital Spy.
"There's certain aspects on the control pad that we've spoken about, but we haven't really gone into a lot more detail of it because there's so much to talk about as it is, I think we would overwhelm people."
Yarnton later added: "I think that's part of what I was talking about before, about there's so many functions that the Wii U has, and it will show and explain to people why we have more features being explained as time goes on, because there's a lot to take in all at once.
"The biggest thing we've found is when people pick it up and have hands-on experience, and they start understanding a lot more of the concepts and the features - so very much sampling and getting people to try the product will be a really big emphasis for us at retail events and things like that."