Why is Forrester Predicting 3.5 Million Tablets Sold in 2010 When the iPad Alone is On Track for 7 Million Units?

Forrester Projects Tablets Will Outsell Netbooks By 2012, Desktops By 2013

This seemed like a reasonable prediction until I read the first entire first paragraph. In it, it says: Forrester analyst Sarah Rotman Epps laid out her projections comparing tablet sales to netbooks, laptops, and desktops. She expects 3.5 million tablets (including the iPad and other tablets) to be sold this year. Hmm, wait a minute! 3.5 million tablets sold in 2010 including the iPad? Where did that number come from? Steve Jobs reported that 2 million iPads had already by sold during his WWDC keynote.