When using PowerPoint, if you have multiple monitors, you can designate a monitor to view your speaker notes, and the other one (geared for the audience) would only see the slide deck. With only one ...
Yes, this is a good idea. The workaround is a non-answer. It is a pain to use two monitors when it is obvious that the speaker should be able to see his notes, plus the next slide, from the main screen, without displaying them to his audience.