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.

As for processor speeds the Corei have this ‘turbo boost’ feature which alters the clock speed on demand. This means you should get about 2.2-2.5Ghz when running only 2 cores, 1.9-2.2.Ghz when running 3, and 2.8Ghz when running 1. http://ark.intel.com/Product.aspx?id=43122

Because the TW games are not heavily multi threaded you will likely not run all 4 or 3 cores when playing which means you should get performance similar to a 2.2-2.5Ghz dual core processor [but which dual core heavily depends on (relative) cache size]. In more day-to-day tasks (especially number crunching tasks) you may see some benefit from using a 64bit OS as well.