Is there any reason why I - being perfectly happy with my American citizenship and residency and having zero intent to change either - should avoid getting one for the novelty of it? I mean, is there any possible downside to getting this thing out of a sci-fi novel?
Certainly for Americans, not a huge number of people will have two weeks spare and sufficient funds to wait for their application to be processed (or the money to fly to Estonia and back twice in two weeks).
Edit: apparently they're "working to add capacity to our embassies to process e-residency applications and issue cards abroad by the end of 2015". This makes the whole thing absolutely amazing. Let's see how the rest of the world reacts, I guess.