Selling your novel: Genre vs. mainstream fiction

I have recently read that, unless their names are well known, writers in future are going to have a lot more trouble selling genre fiction than mainstream fiction, because readers will buy another, cheaper novel in the same genre (which today often means that they will go for a free novel in an ebook giveaway) before they will pay for a novel by an author they haven’t heard of before.

On the other hand, more readers are likely to be looking for genre fiction than mainstream fiction, so you’re at least going to have them checking out your book.

Your thoughts?