Is the Nexus 5 a reality this year?

Does anyone know if the nexus 5 is for sure coming out in 2013? Is it possible that google could pass this year and wait until 2014? Not a lot of information is out there right now and I was wondering if you guys/girls have heard anything about the device.

In addition, I really like the voice/screen features on the Moto X. Do you think these feature will be included in Key Lime Pie?