Ever used those vinyl "window magnets?" This would work in the same way. Having had some difficulties trying to get a perfect application of a screen protector myself, I could see this as a nice alternative as it is cheap and can easily be removed and re-applied if you mess up the first time. (That, and you can literally wash off any dust or debris from the vinyl should you accidentally get some stuck to it before applying it.)
If any of you try this, let me know how it looks. Obviously, you would only go for this if you don't want a matte finish.