thats apple for you.... ever since the ipod...
NEW iPOD 4gig!
1 year later.
NEW iPod now 4gig, 8 gig, 16gig!
1 year later
NEW iPOD now SLIMMER!
1year later
NEW iPOD now plays video!
they know a significant amount of people will buy the "same phone" 3 times just because now they can copy and paste!
This is absolutely no different than any other electronics manufacturer.