The guys and gals at iPhoneGold have a pretty solid timeline describing the iPhone’s genesis.  I’ll be honest though, I love the iPhone and Apple, but I couldn’t tell you if this is completely valid, what missing, omitted, etc.

Gadgets are getting old in no time, and what today is called “amazing gadget” tomorrow will be ordinary, the day after tomorrow - old and outdated. The era of portable music player began with cassette tapes more than 20 years ago. Today, such things as “cassette players” are hard to find, they all gave up their positions first to CD players, now to more compact and modern MP3 players.
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Everybody likes small gadgets that have several features built in and I am not an exception. I bought this Swiss Army Knife with built in MP3 player.
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How to combine pleasant and useful? Only novelties make our life various and interesting. Summertime is just right to put on glasses. But the development of gadget technologies offer much more - do not get behind.
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GEAR4’s BlackBox Bluetooth speaker is splendid for those with ample room in their abode, but where will you turn for lavish sound when space is an issue? Bose? Pish posh. The newly introduced BlackBox micro (sadly) ditches Bluetooth in exchange for a sole 3.5-millimeter auxiliary port, but it does include an integrated SFX gel base in order to use any flat surface to “provide rich bass sounds.” Beyond all that fanciful stuff, you’ll find another traditional driver kicking out mids and highs, and there’s even a USB port for powering it with whatever computer you’ve got nearby. Look for this one to sneak into stores this August for £20 ($40).