iPad, years in the making
An interesting story I found, tells of how Steve Jobs has shown off the bits and pieces of the iPad design over the past several years. The milled aluminum case and the glass screen was introduced in the 2008 MacBook Pro. Over the past few years, Apple has show bits and pieces of what became the iPad. In essence, perfecting the design components and software long before it was introduced. When you think of Apple secrecy and how they dd this under everyone's nose, you have to admire the shear gall.
Re: iPad, years in the making
I Agree it takes years of R&D to get to final stage. When they were developing the iPod touch this became an extension of the project big problem years ago was the cost of memory and chips available.