iPhone 5 with slide-out keyboard

Taiwan based tw.apple.pro has mentioned that iPhone 5 may have a slide-out keyboard. Apple is currently looking at three different prototypes for the next generation iPhone and considering adding a physical keyboard to the phone.

"Another prototype reportedly built by Apple looks largely like the iPhone 4, but has improved hardware including longer battery life and superior camera." , the blog comments.

I believe it's Apple that started a new era of touch-screen phones with iPhone. Do you think iPhone needs a physical keypad?