Re: You don't need a mobile device to make lightning payments
I do not want to piss on the parade here, but is the whole idea of the Lightning Network not to have a 100% digital payment network? we will go backwards, if we start the physical printing of "money" again. 
what about paper wallets? i've still got some love for them!
i quite like the idea of scannable paper bills, though it's more of a novelty to me than anything else. i definitely think payment via smartphone is the direction we're heading here. it's tough to see LN being convenient or easy-to-use without a mobile device in the context of brick-and-mortar stores.