Brian, thank you for your comment.
For me it seems that at the moment the weakest aspect of extruding type 3d printers is the surface finish you get. Regardless of the shape you print it is always striated horizontally and no matter how fine one can make the stepping I think it will be obvious just because of the nature of the filament deposition system.
A 5 axis printer in my view could finish a print by laying a texture or a pattern over the surface of the model. It could be possible to utilise the aesthetic of filament to actual create some pretty cool surface effects. I can see that a delta printer could achieve a similar result in some cases but a 5 axis platform has more freedom of movement so one could reach under overhangs and other difficult geometries.
It is an interesting question and I can see that other makers can think of more ways to use this technology for 3d printing. If anyone feels like sharing their ideas I think it could make for an interesting discussion.