Also, who is going to pay for all these machines? And who is going to wait in line for them?
According the fundamentals of democracy - People are the source of any and all governmental power.
The power of people is abosulte. People create lawmakers [representatives] and other authorities. People give them credentials but they do not lose at this point their power.
So voters theoretical can make any decision despite of someone's will (president, parliament...), any law any case and so on. Theoretically.
Practically there are no fit tools for that. To hold referendums on every issue in the country is very difficult...
We used to accepting the paradigm of democracy that was adopted 250 years ago [representatives, elections one's in 5 years and so on]. but not aware of what is now a level of technological development is so high that allows us to step far ahead!
Who said that democracy shoul be limited by one-in-5-years elections?
so we need to create and implement a system of crytpovoting in order to provide more democratic guarantees and freedoms!
experience of other countries such as Ukraine (where I live) shows how important it is that the political system has to be protected from usurpation