[Clotho]

As far as I understand it the NS solution is the creation of .IDN in the root. They would be separate from any existing .TLD or .CCTLD but there is nothing preventing Verisign from mapping existing .com into new .IDN (version of .com). IE. taking all the Chinese .com's and giving those owners the equivalent .IDN (in Chinese). This would be up to Verisign however. I'm just pointing out that they could do this if they wished to if the NS solution was chosen.

.com is a brand. It is the most powerful brand on the internet. .com has served ICANN well too in my opinion. Having a dominant internet brand has been as useful as having a single internet. (which is the purpose of ICANN, to preserve the root). Anything that fragments .com weakens it and I think the owner of any valuable brand would fight against that.