Most companies do this. Look at the 2013 version of a car VS the 2012.
Simply put, millions of people are in the market to buy at this very second that were not interested a year ago. That will always be the case. Millions of people who bought the iPhone 5 didn't buy the 4S. A lot did, for sure, because a lot of us have phone ADD and buying a phone is a lot cheaper than buying a car, but you get my point.
At any given moment there will be millions waiting, cash in hand (or willing to rack up credit card debt), that weren't ready during your last release. Doesn't matter if you're selling phones, fridges, TV's, or much anything else.
Simply put, millions of people are in the market to buy at this very second that were not interested a year ago. That will always be the case. Millions of people who bought the iPhone 5 didn't buy the 4S. A lot did, for sure, because a lot of us have phone ADD and buying a phone is a lot cheaper than buying a car, but you get my point.
At any given moment there will be millions waiting, cash in hand (or willing to rack up credit card debt), that weren't ready during your last release. Doesn't matter if you're selling phones, fridges, TV's, or much anything else.