Electronics & gadgets Lover

Hi Friends !!! Here is an interesting Topic and plenty to discuss on. Which is the greatest gadgets of 21st century ?
As all gadgets are useful enough but there are some technology that has evolved as the Mordern Marvels. According to you guys which is the greatest gadgets of 21st century ? 1)Multimedia Cell Phones
2)Dual Sim Mobile Phones
3)WI FI Radios
4)Sony Walkman NWZ-W250
5)MSI GX640 Gaming Notebook
6)Squeezebox Touch
7)Lenovo C200 Desktop(Touch Screen Desktop)
8)Sony Dash
9)Apple iPad
10)Light Touch
11)Microsoft Courier Please feel to express your views.
Regards !!