"For those who have both the budget and the space required for a second monitor, but hesitate with the purchase due to worries over potential productivity gains, the MaxiVista software provides an inexpensive way to try such a dual monitor configuration--without having to purchase an extra monitor. The only requirement is that, in addition to your primary computer, you also have to own a notebook or a second desktop PC with its own monitor."
I love multiple monitors. I think they offer a great boost in productivity. However, multiple monitors was not always easy to set up. Video cards used to only have one video out port and alternative video cards were difficult to come by. Now, things have changed drastically. Most video cards have at least two display outputs. However, that is not always practical. That is where solutions like MaxiVista come in. There are other solutions available, but MaxiVista has been around a long time, and based on the video that Tom's Hardware provides, its performance is impressive. If you want to try multiple monitors out, this might be a good option, but if you are serious, I strongly suggest going with a true second monitor. Of course, if you want a mobile solution, I could see this work very effectively with two laptops!