They have dumped Nexus users. Nexus users will just get another Android. This doesn't extend Google's reach. They want iPhone users and this is their attempt. They want to expand their users. If i wasn't mistaken they've put some extra work into their data transfer utility that even copies over iMessages ?
Tell me they aren't trying to hook iPhone users (I'm not saying they will or won't succeed, just implying this is their intent).