I think it's more interesting than you make it out to be. Consider the fact that if you try to reorg the entire blockchain, you have 100% chance to eventually succeed, no matter how low your hashrate (assuming that the ratio between your hashrate and the network's has a positive lower bound).
Indeed, while I was well aware of growth making the historical hashing inconsequential (
http://bitcoin.sipa.be/powdays-50k.png) and playing the reorg lottery I hadn't considered that particular possibility before reading that paper (thanks for the link). Though it does require also exponential growth, which is physically senseless in some sufficiently long run. It would probably be interesting to explore the probability distribution with a relaxed form of that assumption.
