John Bercow has stated that online voting should be available in the 2020 General Election. The idea is to get more people to vote. Other commentators have suggested e-voting and even voting from a mobile phone via some 'Vote App' in order to get young people and 'busy' people to place their x next to a candidate.
So what they want is quantity over quality.
Personally I would do away with postal votes except in a very few cases. Going to vote, getting off your lardy ar5e and making an effort, should be the way to go. Making things easy leads to a popularity contest. At least if people have to make and effort, even if it is only 50% of us, there is a fair chance that some of us will be making an informed choice.