Tablets are great for sitting back, relaxing, and just consuming media. Perfect for sitting on the couch while watching TV, taking to the coffee shop, etc.
I had an iPad (got it last October) but I recently sold it because I just didn't really use it much anymore; my cell phones are just as fast and actually play flash videos. (Captivate/Nexus 1)
If I had the money to spare, I would probably pick up the new Samsung tab because of the size and relatively low price; that and Honeycomb.