"The [insert ereader here] will never be a viable product because...[insert ridiculous assumption here].
I see something like this posted somewhere nearly every single day. These people actually hurt the viability of eReaders in general and may even make for a self-fulfilling prophecy.
Today's example:
Prediction #6 for 2010 on an blog about content management:
http://wordofpie.com/2009/12/31/top-...tions-for-2010
-Mark