Google gears up for smartwatch war

Google's smart watch expected in months
Google's smartwatch expected   

Google is gearing up to produce a smartwatch, and that could mean trouble for Samsung and smaller makers of the devices.

The watch is in late-stage development and just months away from production, according to one report.

Nissan unveils smartwatch

The device would give Google the opportunity to add value to the smartwatch market, which has been focused on extending smartphones' functionality rather than replacing smartphones, according to experts.

Google's smartwatch is expected to integrate Google Now, a function similar to Apple's virtual assistant, Siri.

By CNBC's Althea Chang