There is no way that you can conduct online voting and ensure that the voter is not being intimidated. Offsite voting is a necessary evil for certain people (the handicapped and those who are unavoidably out of town on election day) but it does not need to be expanded to cover everyone. Here in New York we very specifically keep those most likely to intimidate you out of the voting booth, i.e., your employer and union official. The people that can hold a financial gun to your head if you don't vote the way they want. With online voting (or offsite voting on paper, i.e., absentee ballots) there is no way to actually ensure that the voter doesn't have a gun (real or proverbial) aimed at their head when they click 'submit.' For this reason alone I will always oppose it and other measures (vote by mail) that take people out of the polling place.
The summary also makes the assumption that low voter turnout is a big problem. This is an oft-repeated claim but there's zero evidence to suggest that increased participation rates equate to better results. People choose not to vote for many reasons; apathy likely being the biggest one, followed closely by a generalized disgust with the available options. "None of the above" is a perfectly valid option in an election, whether exercised via the write-in for "Mickey Mouse" or by staying home on Election Day.