Even if more people shop online retails shops wont die out completely or, rather will have to change they way they work.
Like yesterday I went out to the local shopping center for the general browse around to kill time. Walking into Exclusive books I saw a book that was on sale. But unlike what I would normally do instead of opening the book and reading the 1st chapter I went for my DHD, scanned the barcode. In no time I was reading the reviews and comparing prices to Amazon and alike.
I found that the book came highly recommended and normally retailed for double the sale price, but just as I was about to walk to the cashier I found a site that was more current pointing out that some errors where corrected in the second edition that was released last month, available on Kindle. I ended up buying the Electronic version to be used on my tablet back home.
Walking around with internet in you pocket is defiantly going to change how people shop, but I do believe that there is a need for actual shops to still exist. People like to feel and touch things before they buy. Walking around can not be done online as its done in a shopping mall.