Blogger John Gruber reported in Daring Fireball that the Apple plans to upgrade the iPod Touch with dual cameras and Retina Display.
The dual cameras in iPod Touch will allow the users for FaceTime video-calling functionality, which is currently available only via wifi to iPhone 4.
Apple launched the first generation iPod Touch on Sept 5, 2007 with multi-touch graphical user interface. It was the first iPod with wireless access to the iTunes Store and Apple's App Store.
The second generation iPod Touch was launched on Sept 9, 2008 with external volume controls, a built-in speaker, a contoured back, Bluetooth support, and the ability to connect a microphone.
The third generation iPod Touch was launched on Sept 9, 2009 which had 32GB to 64GB of flash memory, faster hardware, voice control, light sensor, and bundled earphones with a remote and microphone.