This "future state" is further away than you think....
I think you'll find that a lot of people still prefer to use a mouse instead of a trackpad - even an Apple one, which is the best in the business.
He wasn't saying that people no longer use mice - but rather that most mice sold today are wireless. Further - someone who has the budget to spend $1300+ on a new laptop can certainly afford the less than $50 that a good Bluetooth mouse costs.
Apple was definitely not targeting the market who insists on using their wired mice with the new MacBook.