a dedicated fire resistant bin large enough to hold at least the size of a laptop to cater for spontaneous combustion of lion battery packs in any device on board.
That's all very well, but, once a fire has established (as can be seen in the video) it can be very difficult (and dangerous) to carry a blazing item through the cabin (especially if the item is stowed in an overhead locker).
I believe that Li-On batteries can overheat and catch fire when being charged, but do we know whether the fire in the OP was 'spontaneous' - or when the device was plugged in and charging?