Hello @dkn
Thank you for being interested in Tapo Smart Temperature & Humidity Monitor Tapo T310
In Tapo Sub-G ecosystem, the upcoming models will be the hub and some motion sensor & buttons, the humidity sensor can take longer but the ETA is not yet confirmed. Based on the current information the humidify sensor will still take more time before the official released, thus we recommend keeping an eye on the Tapo Smart website or local TP-Link official website for when the new product released.
Blow article will guide you to take a first look at some new Tapo Sub-G products.
New Tapo SubGHz Family- Tapo Smart Sensors, Smart Switches, Smart Buttons and More on the Way
Thank you again for your fond of the Tapo device!