I realize I'm unusual for the HN demographic, but...
I don't really use the camera on my smartphone, so see no need to replace it. I carry a wallet with the few cards I need daily anyway, so no change there (and even if I didn't need to carry cards, I still need somewhere to keep cash) I don't use my phone to pay for things or access services, so I'm not concerned about doing those things when mobile. I can do what I need to do online from my desktop machine at home.
I do need GPS, but it will be in my pocket computer, so that's fine. I don't need to have online access for this to be useful because I really only use GPS for specific planned activities anyway, so I can preload any maps I might need.
> i only knew of 1 or two (kyocera) that allowed tethering, so now you also have to figure out how to get internet onto your pocket computer - another sim, another bill.
I'm not particularly worried about having the pocket computer be always connected to the internet. I can easily get by without having a constant connection. The pocket computer will have Wifi, which will cover situations where I want to have the machine connect to the internet.