I'll go in a slightly different direction. I'd like to see, and I think we will see, a more "for sale by owner" shift in the years to come. Many above have already said it - younger folks that are comfortable with a computer are happy to search zillow/redfin and review the details/pics of a home on their own.
If you're selling your home, how hard is it to get staging and professional photos done on your own? As others suggested above, it's a good idea for the Seller to bear this cost anyway. Yes, it takes work on your part. And as with most things, if you don't want to do the work, you have to pay someone else to do it.
The biggest issue with this would be how to conduct actual tours, because at some point we need to see in-person what we're making an offer on. Negotiating terms could also get too complicated for many, so assistance would be needed with (at least) these two items. I think that's where an agent is still needed. I'd say that's worth more in the 2-3% range in terms of commission.
With all that being said, I think it's more likely we'll see a hybrid model. There will always be buyers that are from out of town/state/country that actually need their hands to be held through the process. Or, more complicated transactions that need more time to handle from a paperwork/negotiation perspective. That's when a "full-service" agent would come into play.
My dad was a realtor, and he always said "90% of real estate commissions go to just 10% of realtors, because they work the hardest." Whether that's true or not, that 10% (or whatever %) will likely always have business.