mattwnz: This is one reason I think that the ipod touch new version should have the same A6 processor as the iphone 5, not a processor that is already 18 months old, as it will likely mean that future support will cease before the iphone 5.
This is quite an interesting article on how IOS support for the new ipod touch will end a year earlier, compared to previous versions, due to it using old hardware from the iphone 4 and 4S.
http://venturebeat.com/2012/09/14/ipod-touch-uses-old-cpu/