ALL apple mobile devices feature a redesign for the second release and then once every two years. Everything.
2007 iPhone - new
2008 iPhone 3G - REDESIGN
2009 iPhone 3GS
2010 iPhone 4 - REDESIGN
2011 iPhone 4S
2012 iPhone 5 - REDESIGN
> Cycle: Redesign on even years
2007 iPod touch - new
2008 iPod touch 2G - REDESIGN
2009 iPod touch 3G
2010 iPod touch 4G - REDESIGN
2011 iPod touch release skipped
2012 iPod touch 5G - REDESIGN
> Cycle: Redesign on even years
2010 iPad - new
2011 iPad 2 - REDESIGN
2012 new iPad
2012 newer iPad
2013 iPad 3 - REDESIGN DUE
> Cycle: Redesign on odd years
The two year mark for the iPad redesign will be March 2013.
Don't buy the iPad with the Retina Display - a new one is coming less than half a year away.
2007 iPhone - new
2008 iPhone 3G - REDESIGN
2009 iPhone 3GS
2010 iPhone 4 - REDESIGN
2011 iPhone 4S
2012 iPhone 5 - REDESIGN
> Cycle: Redesign on even years
2007 iPod touch - new
2008 iPod touch 2G - REDESIGN
2009 iPod touch 3G
2010 iPod touch 4G - REDESIGN
2011 iPod touch release skipped
2012 iPod touch 5G - REDESIGN
> Cycle: Redesign on even years
2010 iPad - new
2011 iPad 2 - REDESIGN
2012 new iPad
2012 newer iPad
2013 iPad 3 - REDESIGN DUE
> Cycle: Redesign on odd years
The two year mark for the iPad redesign will be March 2013.
Don't buy the iPad with the Retina Display - a new one is coming less than half a year away.