The lion kingdom has accumulated dead macbooks over the last 8 years.  As their batteries puffed & their computing power became insufficient, they became useless, but their solid metal cases survived.  What if the innards could be replaced with computers that met modern requirements?  It's famously cheaper to get the computing power of a macbook pro in another shell & lions could easily reduce the battery size to make it lighter.  There are some mane challenges.

The display: there was a guy who managed to control a macbook display with a simple board & the connector looks similar.

http://mikesmods.com/mm-wp/?p=384

The problem is it's so rare for macbooks to wear out & their users are so computer illiterate, converter boards are expensive.

The CPU: It wouldn't be possible to swap the innards of a Dell because of the cooling system & the Dell would work in its own case for about a year.  

The whole idea depends on single board computers being cheaper & more powerful than the macbooks they replace.  Today's abundant single board computers are nowhere close a macbook from even 8 years ago.  For game development & video playback, they might be a solution.  For embedded development with modern tools, fuggedaboutit.  Lions just need more performance.