Yeah, your wired vs. wireless question was a bust.
What most people will want is a wireless (wifi) product that importantly can be powered off the existing door bell transformer. The Ring Doorbell will either power from an existing doorbell transformer or will run from replaceable batteries. The functionality of the product is significantly limited when running purely from batteries. It’s ok to support a battery powered only mode, but if the user already has an existing doorbell with a transformer, why not take advantage of the power and keep the camera alive all the time for real time streaming or streaming on demand.
Also, let me suggest that you make the product as narrow as possible. Ideally 25mm wide, but under 35mm in any case. Most existing doorbell cameras are too wide to fit door frames with surrounding sidelight windows. Your average existing doorbell button is about 20mm wide. The current Ring Doorbell is about 62mm wide and will not work on many door frames.