Note. Lemur's assessment of screen size is not correct. It is not physical size but resolution that matters as far as FPS go; and it should be noted that the Novatech sports a 1080* resolution (1080p or 1080i) even though it has only a 15.6" screen. Furthermore its 17" alternative has the exact same resolution.
Why Lemur's rule of thumb works in practice is that bigger screens (usually) have larger resolutions to keep the pictures sharp and clear. But as mentioned the Novatech has a same high resolution as your average 22inch monitor so you should compare it to a typical 22inch monitor. The real issue with these monitors are: power draw (bigger monitors draw more power; and it is worsened by the fact that most power-saving strategies do not work as well with monitors), price (are they worth it to you?), and portability.
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