Google Czar promises Insanely Great Cameras in future Nexus phones
Google Czar Vic Gundotra (VP of Engineering), in a conversation on Google Plus said "We are committed to making Nexus phones insanely great cameras. Just you wait and see.". There are no permalinks to individual posts in Google Plus, so if you want to quickly find his statement, use your browser's search feature to search for "We are committed". (via CNet)
Google has not yet announced a 2013 Nexus phone. Their most recent Nexus phone is the LG Nexus 4, announced in late October 2012.
Since Google's co-founder Sergey Brin is a big fan of photography, this sounds like a promising promise.