I think Amazon is far enough ahead at this point that they have this market in-hand for the foreseeable future. There were reports from CES that Echoes were everywhere, at every booth, and vendors were purposely presenting product features as they related to Echo functionality. i.e. "... and this TV is compatible with Amazon Echo. Simply tell Alexa to turn on the TV, change the channel, record a show... it's so easy!"
Amazon is doing a great job marketing the "Skills" function to major companies, which are now developing entire product lines with Echo-compatibility in mind. Amazon has been able to generate consumer knowledge of their product. Many people are now associating Echo with the word "upgradeable," due to Skills, and that's a very good thing for Amazon.
With that being said, the Skills market is pretty horseshit right now, and Amazon needs to get off their asses and figure out a better way to organize that hot mess. It's just being pumped full of garbage homebrew skills that are making it impossible to find the good stuff.
