It looks like when you exclude those not interested in buying a tablet (or they already have one), half of consumers are planning to buy an iPad this year. Android has "sold consumers", about 20% of them to buy an Android-based tablet this year. The holiday market is sure to be huge this year, and 3 out of 10 consumers have really not decided what they want yet, but most tablet owners pay for content.
Amazon is planning to enter the market in a couple months (along with a new iPad from Apple) and could definitely try to win on price. Amazon has been building Kindles for some time and knows what consumers want, they just need to "build it and they will come". These next few couple months will definitely be interesting...stay tuned!