I agree; this is my biggest problem with the inevitability of online only retail. I don't mind buying (relatively) cheap items more-or-less blind, but when you start getting into hundreds and thousands of dollars it's harder to part with your money without seeing the item in person. Reviews are a nice source of information, but they can only tell you so much.
Another thing is that it's nice to go browsing every once in a while. Generally when you're going to buy something online you know ahead of time what you want; you don't really browse online in the traditional sense. I remember going to CompUSA and Circuit City and coming across all kinds of cool things (this was way back before everything turned to shit).
Sadly I think the only thing that's going to give brick-and-mortar retail a chance is taxing online retail, but at this point it's probably too late even for that. It's kind of sad thinking that in the future nobody's going to go to the store to buy anything anymore; it's all going to be shipped from a sterilized warehouse by computers and robots.