What do you purchase online now that you used to purchase in-store?

Are there some things that you used to have to buy in-store that you now only (or at least most of the time) buy online?

What are they? Why do you buy them online now? For how long have you been buying them online? How much of a convenience does it provide? What other benefits do you get out of online purchases? Do you think you will be making more and more purchases online as the years go by?

Will there be a point to where we, as consumers, will make more purchases online than at a store? What effect could this have on our economy?