Is there any point to using a ring flash for styles other than macro (i.e. portrait, landscape, wide angle, street, etc.)?
Yes, they can be useful in phootgraphy other than macro. A 'ring light' (usually one of the more larger ones) is occasionly used in portraits, due to the soft and even way it illuminates the subject and provides circles catch lights within the eyes. (As the light is central surrounding the lens, it reduces shadows usually caused by lighting position).
It also saves on having to take out say a large softbox which could be a problem depending on space or location.
(Sorry I don't have any samples I've shot with a ring light to attach, but give it a Google, you'll see what I mean by the catchlights).
In addition to portraiture - where one can be used as either a key light, a fill light, or simply a catch light - ring flashes are often used in forensic photography, both at macro and non-macro reproduction ratios. Then there's the whole "Jarvie" window thing or even using it in the scene as a compositional element.