I can see this as something most people are not going to want to carry around. Phone, keys, wallet and sunglasses are too much as it is.
Maybe they can integrate them into purses/man-satchels/bras/brossieres etc. along with wireless recharging and built-in antennas in the straps.
Give it a few years, cellphones in early 90 had brick-sized batteries and yet people still carried them around, now it is hard to find a phone that is not a miniature wi-fi enabled game console with a video camera that can also make phone calls.