Over a fifth of the public may be interested in buying Apple's rumored tablet device, says RBC Capital Markets' Mike Abramsky. The analyst notes that in a recent survey of 3,100 people, 21 percent expressed interest in buying the tablet, despite the lack of an announcement by Apple, or even a detailed set of rumored features. The anticipation is considerably higher than the 9 percent measured for the iPhone in April 2007, says Abramsky.