in my view the medicine against crazy depending on new technology products is tp buy (if needed) 1 year yes, 1 not = 1 product yes, 1 update not, 1 yes
imho the middle product is almost never a huge step
so for example the Ipad2 is a good buy for who doesnt' have it at all (ipad 1)
but it's not such an huge buy for owners of previous version
a part, obviously, who's got a lot of money and can afford to buy 99 different versions just for fun
ofcourse Jobs (but also all the big producers of the world) would love WE to buy every edition.
ps: but if you need a second ipad for family reasons, then it's a good choice (while it is not just to upgrade the first one)