We all call them Kleenex, but they are facial tissues. If someone had tried to trademark 'facial tissue' we would be in the same ballpark here.
The most defensible mark is a fanciful one, that is a word which does not otherwise exist (Kodak, Xerox, Pepsi, etc). Afaik, Kleenex actually is the best possible name one could choose to associate with tissues, since it is entirely fanciful (and Kleenex company has done a good job associating their name with tissues). As an aside, it is possible for a diluted mark to lose its protected status (such as with Bayer's "Aspirin" analgesic).
These marketing people might as well start trying to trademark things like 'desk' 'pen' or 'screen'.
Netbook would probably fall under the "Suggestive" trademark category (the third most defensible category, behind Arbitrary and Fanciful). Net and Book both exist as words, but were previously not widely applied to this sort of device.
So, in conclusion, "Netbook" is nothing like "pen" or "desk," as far as trademarks go. Neither of these examples would even be registerable, unless they were referring to something they weren't (you could make a ketchup product called "DESK" or a cell phone called "PEN").
With X-Box, you need to hack the HD in order to run any other software. With the PS3, you simply go into the system menu and select (install other OS).
Sony's just as evil as the next company. From what I understand, they declared the PS3 to be a "computer system" as a means of avoiding tariffs in Europe, and to do this they needed to offer access to the OS. Plain and simple. They tried this with the PS2, but it didn't offer access to the OS, and thus failed the test (as I am led to believe).
In computing, the mean time to failure keeps getting shorter.