Looks like Hikvision has released it's new 4MP camera's, and looking at the specs they are amazing! 0.01lux at 4MP (down from 0.07lux at 3MP) and 2688×1520 resolution (up from 2048×1536).
DS-2CD2042WD-I
Datasheet: http://overseas.hikvision.com/uploadfile/image/20150514084521014.PDF...