But, but, will it bend if I sit on it? 
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Really? I doubt that very much.
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Guys, let's perhaps think from Apple's prospects on this subject:
1. Purely from profits prospect: thinner case = less costs
Really? I doubt that very much.
watch ect. If that's the case with with your logic then building smaller microchips going from 45nm down to 14nm is useless. You have to understand that battery technology is not going to get much better but the sea of the components are limitless