Actually Apple has always been ultra obsessed with thin devices, it's just that in the last year there wasn't much room to go thinner.
Luckily to satisfy their intrinsic need to keep making their goal of thinner, we have super adhesives that allow apple to toss the fasteners and bind it all with glue.
Whatever challenges that presents, such as some broken or damaged components in the attempt to repair faulty units, only makes more money for Apple. They have always been good at selling hardware.
2014 ought to be quite a year. Thinner glue perhaps?