This thread
But I believe Rihanna will be one of many (Katy, Gaga, Flo Rida) well known for dominating the digital era. Even though it is mostly about quantity with Rihanna, she is one of many that helped jump start the digital music movement.
Her ever changing hairstyle and tumbling relationship with Chris Brown will probably be of much discussion. The latter especially if it finishes off her career and/or life.
No shade, but her lack of talent and contribution to music creation will stunt people from looking beyond her image. I am sure there are people who desire to be Rihanna based off her glamour and success. Make no mistake about it; Rihanna is a statement of today's aspirations..Which will could be either praised or bashed in the future.