Here is the announcement:
CNET says : "There’s no comparison – the Ecobee4 is the best smart thermostat available today."
http://www.tomsguide.com/us/ecobee4,review-4356.html
Suggested Retail price: $249 with the integrated Alexa voice skills, not too bad!
For a comparison of Ecobee vs. other ST connected thermostats, refer to
The best features for ST users:
-The rich APIs that allow to control almost every aspect of your smart thermostat in Home Automation scenarios under ST (see my previous post for details) and
-The HomeIQ portal which allows you to access ALL your data (contrary to Nest).
See the HomeIQ screenshots here:
Regards.