Wow, see now that's awesome! Thanks for sharing! And yeah, it would be beneficial to not have a third party system that uses lets say visa. Hopefully more development will take place on this card. Any ETA on it's release date?
its a gimick, its not solving anything. these days everyone has a phone and a phone app can easily sign a tx 'offline' and push a signed tx to the internet..
its not solving bitcoin congestion of mass adoption.
plus also requiring multiple hubs eg 1 per town.. what financial benefit would anyone have to be a hub(full node)...
did you even watch the video?
there are no "hubs" or "full nodes" required. a business just adds the proxy tool to their internet router and you can connect this card to it and pay the bill.
2minutes 5 seconds:
"and tiny hubs and businesses"
by the way if the cards are to receive the tx data of the originating funds/get balance update. to be able to create a new signed tx.. they have to get the data from the "and tiny hubs and businesses" meaning these "and tiny hubs and businesses" will need to run a full node..
yes the gadget of the hub may be tiny... but that does not mean that full blockchain data wont be needed..
so next time watch a video more then once and then put the theory into practice to see what else would be needed and the reality of the situation.
dont take anything on face value, always investigate research theorize, poke and prod
the other part is that the video doesnt even talk about battery life or recharge times of a card. thus it proves the video is not telling the user everything.. apart from basic theory.
even the mobile network, blutooth, wifi all talk about long range from 100metres to 3 mile yet anyone actually using it will know that signal strength is not guaranteed (we have all had signal drops)... and dont get me even started about the requirement of having another bitcoin user in range aswell...
so with all that said about the limitations.. my point was less about the limitations and requirement of hubs/nodes/other card users.. but more so about that using these cards are no different then using a phone app.. whether its a phone that can sign a tx or a card or a trezor, or even a mathematical genius hand writing it.. the cards do not solve the blockchain bloat issue