Sometimes companies buy IP , just to block it from being taken by other company.
Many times , they really do not intend to build products based upon that IP.
The interesting case here is that of Google buying Motorola Mobility to tkae hold of some 17000 patents, to counter the stiff competetion of Microsoft and Apple and later on selling the company to Lenovo at loss, but holding on dearly to those patents!
The Other Tesla David Blaza5 comments I find myself going to Kickstarter and Indiegogo on a regular basis these days because they have become real innovation marketplaces. As far as I'm concerned, this is where a lot of cool ...