IDC has published an overview of its Top 10 Predictions for 2010; In the fifth prediction, IDC then goes on to call an Apple tablet a "no brainer": "This year, however, we predict that Apple will finally introduce this new device family, which is more of an oversized (8in., 10in.) iPod Touch than a downsized Mac -- and if you look at developer energy around iPhone/Touch platform, this should be no surprise at all," IDC claimed. "This prediction is a no-brainer: there's enormous appeal in sizing up the iPhone/Touch for a variety of applications and activities that people already use those devices for but would jump at chance to have a larger screen -- watching videos/movies, reading books/magazines/newspapers (it would take a big bite from Kindle), surfing Web, video phone, and online gaming. Look for Apple's "iPad" by year-end 2010."
More info: Top 10 Predictions (pdf)