Is it possible to reach this level of realism in keyshot?
Yes. I'd say so. The challenge you'll run into is finding quality textures or UV-mapped models (unless making them yourself) and proper backplates (photo seen outside of building) and matching HDRI lighting. The rest is a matter of finessing the lighting.
Is it possible. I think so. Is it easy, no. However, I don't think this level of rendering is typically 'easy' in any program.
Agreed with Will, it is certainly possible in most rendering engines if you know what you're doing. This isn't even the top-level in my opinion. I think Keyshot could top this.