I don't think "ate their lunch" is a reasonable description, it's early days and successful startups win over the long run. The "E-Go" board you linked to below

I don't think "ate their lunch" is a reasonable description, it's early days and successful startups win over the long run. The "E-Go" board you linked to below has hardly any of the mindshare that boosted boards has, and their website doesn't inspire much confidence that their product is anything more than a cheap knockoff that pretends to have more range by reducing top speed.