The ecobee4 smart thermostat will reportedly have support for Alexa according to some new marketing materials for the follow-up to the ecobee3 that have been discovered, which appear to show the voice integration. To be clear, there is no detail in the image that actually says "Alexa integration" is present, but the image does show the upcoming version of the ecobee thermostat and there is an icon displayed on the far right of the front of the device that shows a mic, along with the familiar looking blue light bar that you can find on Amazon's line of Echo speakers.
The blue light bar is of course a bit different, as the one on the Echo follows along the entire edge of the speaker rim, whereas the one seen on the ecobee4 is more straight and only follows the top edge. The Alexa integration that is said to be present in the ecobee4 will allow users to adjust the temperature either up or down all by using their voice not too unlike you can do already with the Amazon Echo or the Google Home and its compatible smart home hardware. The upside of those devices is that they allow much more functionality than simply turning up or turning down the hot or cool air. As one would have it the rumor is that the Alexa integration inside of the ecobee4 could allow for most of or all of the same functionality as the Echo.
Full Alexa integration would certainly make it a more formidable opponent in the smart thermostat market by setting it apart from other similar devices, and could essentially serve as an Echo speaker of sorts as the ecobee4 is said to have a speaker built into the back of the device. Though not too much different from the currently available ecobee3, the design used for the 4th Gen. model looks to have some slight improvements and updates. There's still no word on a release date for the ecobee4 nor is there any information on an official price tag, though in regards to the cost chances are it won't be much more than the ecobee3 was when it launched, yet it could have a slight increase in cost due to the Alexa capabilities.