Google has their hands in all sorts of areas, and one of those is robots. They bought Boston Dynamics back in late 2013, a little over two years ago, and are now looking to sell off the company they paid an undisclosed sum for. Similar to what happened with Motorola, under Google's ownership. While Boston Dynamics have built some pretty cool robots under Google's ownership, and even released a few videos showing exactly what they are capable of. It appears that many executives at Alphabet don't think that Boston Dynamics can generate a marketable product in the next few years.
According to a couple of people familiar with Alphabet's plans, they were hoping that Boston Dynamics would generate some real revenue for the company, but it doesn't look like that's going to happen. So the company is reportedly up for sale now. Alphabet hasn't yet confirmed that they are looking to sell off the company just yet. Also according to these people that are familiar with the plans, it looks like Toyota Research Institute and Amazon are among the buyers for Boston Dynamics. Toyota Research Institute is a division of Toyota's Motor Corporation, and Amazon already uses robots to assist in fulfilling orders in their many warehouses around the world.
Back in 2013, Android's founder, Andy Rubin was in the field of robotics at Google after having left the Android team, and he made the deals for a few different companies including Boston Dynamics in late 2013. Andy Rubin then left Google in October of 2014 to pursue other opportunities. After Rubin left, reports began to speculate that Replicant was plagued by leadership changes, and failures to collaborate with other companies. Which is now why Google is wanting to sell the company.
It's a bit unfortunate that Google wants to sell Boston Dynamics, as they have something really great on their hands. But as we stated earlier one, many within the company don't think that the division could make a marketable product for a few years. Which means it would just continue to take money from Google and the rest of Alphabet, without accounting for any of their revenue.