Apple will make significantly more revenue upgrading the Apple Watch annually. They don't do so with the TV because: 1. there's little they can do on an annual basis that would entice owners to upgrade. 2. It's not a product people would want to upgrade annually.
Although it would be nice for earlier adopters if they go with a bi-annual upgrade schedule.
Although it would be nice for earlier adopters if they go with a bi-annual upgrade schedule.