And since the SC is two-way pegged, that would be great.

In fact, I hope this will be one of the first SC ever made, that would be the right way to add an anonymization layer onto bitcoin. I tried to setup something similar in the past but I could not solve all the details that the paper instead correctly addresses.

Ultimately, SC are what will completely destroy all altcoins and will give more and more value to Bitcoin, exactly because to the hard-pegging of the currency: what happens now is that for each new scamcoin that is launched every bitcoin holder must choose if part some of his bitcoin stash to buy some of the new coins because they may become more useful and hence more valuable of bitcoin in the future.

But with sidechains there is not such dilemma: since a well defined protocol to switch coins to/from every SC is in place I can wait to enter the SC only when, and if, the thing is useful for me, and not a moment before (and with the possibility to come back, too).

With sidechains we can hope that a new one will be highly successful without the fear that we have not bought his coins in time, because we already have them (of course supposing we are invested in bitcoin), and for all of them (all of the sidecoins that will ever be made).

So, people like Satoshi, Cypherdoc and other highly invested in Bitcoin should be very, very grateful for sidechains because that's the best opportunity we have to maintain the relevance of bitcoin (and hence his value) in the future.