Hmm, if anything, the most interesting near-future experiment he mentioned is the one by Dirk Bouwmeester's group. No one has the foggiest idea about how to construct the Wigner’s friend experiment, not even in principle, given that it is no different from the original (though non-lethal) Schrodinger cat experiment, where Wigner’s friend is the cat and Wigner is the observer.
Surely there's a difference between thinking that experiments that can distinguish MWI and Copenhagen are infeasible for various technological reasons, and thinking that MWI and Copenhagen are empirically indistinguishable. I usually interpret empirical indistinguishability as "no conceivable distinguishing experiment" rather than "no feasible distinguishing experiment".
There are certain observables for which MWI and Copenhagen predict different expectation values, provided decoherence is contained. The problem is, we do not currently h...
http://www.scottaaronson.com/blog/?p=1103
Eliezer's gung-ho attitude about the realism of the Many Worlds Interpretation always rubbed me the wrong way, especially in the podcast between both him and Scott (around 8:43 in http://bloggingheads.tv/videos/2220). I've seen a similar sentiment expressed before about the MWI sequences. And I say that still believing it to be the most seemingly correct of the available interpretations.
I feel Scott's post does an excellent job grounding it as a possibly correct, and in-principle falsifiable interpretation.