The Control Center can control the new TiVo stream but you'll need to set up that device as an Andriod Streaming box to control it.
During setup, your TiVo Stream device will appear as an unknown device. You will need to continue to the next setup screen where the Control Center will instruct you to label the device using a list of manufactures. Select Andriod Streaming Box from this list to set up controls for your TiVo Stream.
NOTE: The Control Center does not deep link into TiVo Stream devices. You may be able to launch apps using voice commands but you will not be able to launch spefic content or LIVE TV using voice commands.