What? No more? I just made a fresh batch of popcorn....
I can't say I see the low light/dark area sensors as being that disruptive to the "high end" dSLR market. Simply put, what Canon is providing is already truly excellent for the vast majority of uses. Will Canon lose specific niches, sure. As an example, I shoot a little of everything. The only time I see the issues being discuss is in my nightscapes. Which is <1% of what I shoot. I see the dSLR market at a point of diminishing returns. For years there was rapid improvements from one generation to the next. I expect that to slow now.
That said, I don't think Canon's problem is Sony/Nikon/etc. Their problem is their top 2 dSLRs are approaching 3 yrs old that will need updating if for no other reason than people like new releases (think car models), Canon needs to update the 5D and 1D series in 2015 or 2016. A good part of the market for the 5DIV is going to come from those that want to upgrade from the 5DIII. I think a big part of that will be the improved sensor tech. Granted, they'll need to frame it to sell to the masses (I can also see a few more MP, DPAF or better, and a few more FPS). In other words, it is Canon's problem to make us want to buy more gear. I expect them to figure something out.
BTW...lytro or some more advanced take...that could become a disruptive technology.