People used to say the iPod would bomb, it's done well. People said the iPhone would bomb, it's done well. People used to say the iPad... well, you get the point.
No, not really.
When the iPod was launched mp3 players were already tiny and popular. The innovation was that iPod had a tiny hard drive (and it wasn't the first to do that). No one said iPod would bomb.
Then the iPod touch came out and everyone said what an awesome phone it could be; no one said the iPhone would bomb. In fact the hype was so strong at the time, Apple could have made almost any phone and it would have been popular.
Before the iPad came out, everyone said it would be awesome. Steve Jobs was the only one saying that they had tried large scale touch UI but it "didn't work".
If Apple is saying that the Galaxy Tab looks too similar to the iPad then they really should find some new designers because there is nothing visually innovative about the iPad since the iPod touch.