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It's pathetic that apple fans can be so blind.
HISTORY: It's a community spirit that has grown over many years being looks down at and has something to do that back in the day we all were designers working on Macs.
However, moving to your statement, there are good uses for PENs. Like this one for example from WACOM:
http://www.wacom.com/en/Products/Bamboo/BambooPaper/iPad.aspx
The point SAMSUNG wants to make is to be cooler than stupid apple users (how they see us in their commercials) because we don't use a pen to move someones head. It's just a bad commercial. They highlight a pseudo USP in their marketing campaign. Zero emotions. Trashing other target audience people. Seriously, if you want me to switch, don't trash my products. Especially not with customers having an emotional brand attachment. Wouldn't work with Nike either.