Aeotec Z-wave products tend to be somewhat expensive, so it will be interesting how their pricing will be for the Zigbee devices. I wonder if the devices will be updated to Zigbee 3.0.
If they undercut the Z-wave pricing significantly, it could detract from their Z-wave sales. However, if they price the Zigbee devices too high, competitive devices from Centralite, Tuya, Aqara, etc. will detract from sales of the Aeotec devices.
For example, I recently purchased six Centralite water leak sensors for $25 each. These are more expensive than the Aqara water leak sensors ($20), but I consider the Centralite devices to be worth the extra cost as they are standard Zigbee. The Centralite devices are appear to be quite similar to the older Smartthings water leak sensors with the exception of battery type. Thus, I would be reluctant to pay more than $25 for an Aeotec water leak sensor if I could get the Centralite for that price.
The one Smartthings device for which there appears to be no competition is the multisensor which does contact, tilt, vibration, acceleration, and temperature. I like using them on exterior doors as it will pick up vibrations from someone knocking on the door or attempting to jimmy the door. If the door is opened, then the contact sensor will trigger as well. They area also great sensors for garage doors. So the return of that device is something I welcome. There are very few vibration sensors available other than those by Aqara and Tuya and they do not have the same functionality as the multisensors.