It's been rumored that Google (GOOGL -0.30%) might be releasing a version of its Nexus 7 tablet for a rock-bottom price of $149 -- $10 below what Amazon (AMZN 0.60%) charges for its Kindle Fire tablet. Considering the fact that the Amazon ecosystem undermines Google's search engine and app store, this move appears to be an effort to mitigate the threat from Amazon's low-cost stronghold. In this video, Motley Fool contributor Steve Heller discusses what the prospect of a $149 Nexus 7 tablet could mean for Google investors and what to keep an eye on going forward.