This is a great idea whose time has come! It will do more to encourage all Federal workers to explore remote working than any other piece of legislation. In fact, it may open up the possibility of all of us voting remotely. This will expand the democratic process and result in more efficiency. Not sure about effectiveness because that is more of a political issue.
I don't think that it will radically transform Congress, but it is a small step in the right direction. It should result in more "work" being conducted and some savings in travel expenses, not only for members of Congress, but those who are called to testify.