From here we can speculate that Cook may refer to smartwatches or HDTVs.
Various analysts are saying repeatedly that Apple is going to launch such products in near future.
“If you look at the skills Apple has, from hardware to software to services and an incredible app ecosystem, this set of things are very very unique. We obviously believe we can use our skills in building other great products that are in categories that represent areas that we do not participate today.”
In addition, it is rumored that the next iPhone will have a larger display that the current ones.
In conclusion, next year we can expect pleasant surprises from Apple, and rumors about the following Apple products will definitely be numerous.