It’s basically the next step in bringing virtual performers to living, breathing life; and with Ang Lee sworn to providing digital characters driven by real physical performances, the future of this sort of effort looks rather bright.
Even in terms of Smith’s performance, Lee coached him to act more like his younger self.
Combining those acting skills with reference materials from Six Degrees of Separation and Bad Boys-era Will Smith looks, Junior became more than just a composite current era Smith and his old school looks.