DSLR will never beat MF digital
"Never" might be too strong, depending on what it takes to "beat" it.
As DSLRs continue to improve, in what ways do we think that will happen? We know that pixel counts are reaching upper limits already because of the physical limitations of lenses to resolve to much smaller photosite sizes than are already being made. But what about bit depth and dynamic range? Those could be expanded quite a lot, I'm thinking, and it seems like a logical step for the DSLR manufacturers to take, in order to stay relevant and ahead of the competition as they explore ways to improve what they offer.
Beyond overall size differences between 35mm and MF, those bit depth and dynamic range improvements are the real advantage of MF at this time, but erase those differences, and all we have left is the overall sensor size.
On that issue, we get DOF performance and the ability to enlarge further without losing quality. On the DOF, that is mostly addressed already by faster lenses associated with DSLRs. On the enlarging issue, large prints are viewed from further back, and are already being successfully produced by high end DSLRs without a problem.
So, when it's all said and done, as DSLRs improve in those areas mentioned above, taken together with the other things where they already beat MF, such as in frames per second, it may be too difficult to justify the nose-bleed-high prices of digital MF for such marginal gain, other than as status symbols. And at that point, maybe they will indeed "beat" MF digital, for all practical purposes.
I guess time will tell...