Hmm this got me thinking..... instead of actual business cards. A good invention (assuming it does not exist already) would be a sort of "button" let's say a tiny device the size of a button. that u keep clipped on to ur shirt or in ur wallet or wherever u would normally keep u business cards....Then when u want to give someone ur details u just whip out ur button and tap their phone and boom..ur details are sent to their phone... the button ideally should not require a separate app that needs to be downloaded but able to integrate with the existing contacts system on IOS and Android phones. Maybe even a double tap for "personal contact details" and a single tap for "business contact details"
Hmmm sounds like a nice idea to use to launch a Kickstarter / IndieGoGo campaign on
..nice name for the business and domain could be ContactButton.com
Run along now... go get it developed and launch a crowdfunding campaign - take full credit just give me 10% royalties on all the funds raised