However, one thing to keep in mind is that price matching policies are usually only valid when comparing prices on the same product model numbers. In other words, if Amazon and Best Buy are selling a TV with the same brand name that has the same features, but the model number is even slightly different - that could give Best Buy an "out" on the price match. With Best Buy in dire need to have a strong holiday shopping season - It will be interesting to see how this plays out.
For the details known so far, read the report from Gizmodo.
As an additional note, Best Buy has also indicated that it will offer free shipping of items that may be out-of-stock at local stores during the holidays. However, be sure to check the ads to make sure the product you are looking for in store is not advertised as a limited quantity promotional item.