@Adiventure Yes, all you need is to replace the Arduino with the ESP8266. Install WLED on the ESP8266, solder you data wire to pin 4 of the ESP, connect the ESP’s USB to a USB port on the PC (not sure how you power you LEDs, but mine are powered by an external 5V brick), and you should be ready to go. If you change the COM number in your device manager to be identical to your Arduino, Prismatik will see no change at all in the setup, and LEDs will start moving just like nothing happened!
As far as the smartthings integration, see my other post here:
So now you are able to manually turn on/off/ change brightness & color from ST (or from Home Assistant for me, Google, Siri etc…), but as soon as the PC is on and serial connection is made between Prismatik and the ESP, ambilight begins. After about 10 seconds of inactivity from the Serial com, LEDs are back to their previous state.