The problem with this render is that it is very flat. Nothing has any sort of highlight on it and the object itself almost blends in with the background. A couple of ways you could improve it:
- Have a more contrasty background color or change the color of the chair if that is possible.
- Try out different HDRI's that have more contrast that come stock with Keyshot. The one you have now looks to be the startup HDRI which is really flat.
- Look up on google/youtube lighting techniques for product photography. There should be plenty of tutorials. How photographers work is most of the times what you want to mimic in Keyshot.
- You could also try this tut from Will Gibbons : it should let you try out a couple of things very fast to improve the lighting.