Well, yes, when rendering complex worlds with path tracing becomes feasible, Metropolis Light Transport will rock. We're a long way off from having that kind of computational power at our disposal though.
If I find an incredible rendering algorithm that doesn't require any sort of spatial sorting for the scene and has O(log
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) asymptotic time complexity but takes 10^1000 years to run when rendering a single triangle, it won't be very useful.