Actually it's not that simple, at least not according to trials with E-voting in various Swiss cities and cantons. Also, although as a Swiss I totally believe in direct democracy, there are other questions to ponder. For instance, what to do with initiatives that are against international laws.You simply vote from your home computer on a secure line
Also, in a dual party system like the US, there's danger that the political process comes to a complete standstill.
And finally, there's always the danger that it comes to rogue decisions (voters can be idiots, too), like for instance the infamous vote for the ban of minarets here a few years ago.
Personally, I'm also pretty tired of having to vote pro or contra stuff like the construction of a new sewage pipe, just because it costs 20 millions, thus more than the city's parliament can spend without going to a public vote. If it's needed, build the damn thing, coz I, pretty literally, know shit about sewage and it's treatment.