One reason I buy online is that although I may have to pay a shipping charge, that is offset because I don't have to pay sales taxes. I think amazon may lose a lot of business.
I have also noticed that Amazon sometimes charges tax on items. They don't charge it on all of the items; so I am not sure why some purchases are taxed and some are not. Being able to buy something cheaper, and get free delivery is one of the main reasons for ordering from Amazon, plus they have a wide variety that you can't find shopping at the local Walmart. I don't think that Amazon likes having to collect taxes; but companies that have been losing sales to Amazon have been putting pressure for them to have to charge tax just the same as if you bought the item locally.