It means they still want to pre-install some apps on it. That they may want to block your right to choose from other people's ecosystems (the one that is the most obvious is they may want to block Google Wallet because they want you to use ISIS, which is the electronic payment system that they are invested in). Basically, that they want to offer a pseudo-Nexus, to try and please people who want a stock ICS experience, while still locking their users out of services they don't want to have to compete against.
The Verizon Galaxy Nexus and the iPhone 4S are the two most important phones on Verizon right now whether you want to get one of them or not - because those phones actually allow (or threaten to allow) consumers to use apps and services that Verizon would rather bar you from. They want to force you to use services that will make them more money, rather than having to compete against those services to win consumers over.