One of our faculties can CNC pvc models so i had them whip up the iPad2 model (rough estimate) with the current thickness, with 7 mm thickness and with 5mm thickness. My favorite was still the 7mm one. 5mm was too thin in my opinion. 8.8 was great too, for todays standard incredible, but I would like to see it come down to 7mm in the future. More thin doesn't make sense to me.