I see no reason to whine, gripe, and complain. If you have the money and you want the newer one "go and get it". Otherwise I am doing fine with my 2008 mackbook (2.4 ghz, 250 gb hd, 2gb ram) - my only upgrade need is RAM. I got around the hard drive space issue with adding an external drive. And when/if MS ever comes out with OneNote for the Mac, I personally will have no need to run a virtual machine.
I still have a 3G iphone (not 3Gs). It was my first iphone and still does well. I only bought the ipad when it first came out, due to needing something more portable than a laptop and a bigger screen than my iphone. I have no plans on upgrading to the new ipad. Everything works just great. My only beef is the developers who still have not made an ipad optimized version of their app.
FACEBOOK for one - long overdue....
Would I want a rear facing camera on an ipad? why? that size device is too big to take pictures with. Front facing would be nice for facetime/video chatting - but not a real deal breaker for me.
My real gripe is with people who complain they can't work with their equipment, it is 10 years old (or more) and clearly lived it's life (and they have the money) but still won't upgrade. Other than that, I say - if it still works, does not truely hinder you, then why upgrade at every release.
I only plan on upgrading when the device no longer works.....