I agree, the distribution companies and cinema chains will remain in the same hands, so I'd be surprised if there was increased access.
The only thing factor that might change that, is that with no print costs, distribution companies may push harder to get their indie product out into the cinemas. It's difficult to tell at this point. The pressure that would make that change, needs to come from two different directions, down on the cinemas from the distributors and at the same time up on the cinemas from the consumer. You only need one chain of cinemas to see it as commercially exploitable and it could happen.
What is more likely is that digital distribution will allow a distribution company to buy in an indie film on a per download deal and then they'd offer a selection of films from their catalogue. This would open up possibilities for more indies getting a market, because the cost for the distributor would be next to nothing, just space on the server.
This could be both a good and bad thing. Good in that it will give more access, bad in that there will be no incentive for the distributor to market the indie films, because that will represent a real cost to them and therefore a risk. This would mean that, once more indies would have to self market the product and the distributor would be the main beneficiary.