In 5 or more years you will have 1TB ssd on... mobile phones running nodes...
See you then. Meanwhile, Darkcoin will become the go to privacy-centric in several months. There are already solid ideas on how to make unmasking transactions through node collusion exceedingly difficult. Impractical even for an entity that controls half the nodes. So once that is done, what exactly does CN have to offer?
How would it become exceedingly difficult? AFAIK right now it can be done by any masternode.
Even if it's impossible, the Darksend privacy is still fundamentally flawed, see
http://www.scribd.com/doc/227369807/Bitcoin-Coinjoin-Not-Anonymous-v01 and
http://www.coinjoinsudoku.com/advisory/.
Monero has practical working anonymity
now.