Well there are lot of fractal pics and videos. Wast majority of videos are random eyecandy shapes with meaningless names like "Steampunk techno garden of cubes" with "Fly throught". It soon gets boring.
In theory 3D fractal programms are enought poverfull to create some kind of meaningfull videos. Say "Flight throught fractal Milky Way and asteroid belt with landing on Uranus", "Big city fractal life" or "Tartigates in swamp" or "Swim throught underwater coral reef".
Maybe 3D zooming and forward movement is a weak spot. Often are hard to just fly forward throght some box, maybe too small scale and unexpected results mixed with zoom and movement, not shure. In 2D it is lack of instruments, it don't have objects, naturalistic lights or direction where to fly.
So this could be a right direction where to move. (better zooming capabilities and different pattern box formulas) and some thematical creations.
Thematical but not so fractal:
http://www.youtube.com/v/lBfWfzZRnYA&rel=1&fs=1&hd=1 There are few interesting Buddhabrot pictures. Some are cosmic, some are like comb jellies, but they are very few. There is not so mutch Buddhabrot renderers, at least one buddhabrot renderer with many formulas and switches could be a righ thing. Ultra Fractal implementations of buddhabrots are somewhat plain, single channel with Fractints map don't have enought colour dimensionality.
Buddhabrot and comb jellyIn deviantart.com portal the most popular are Fractal Flame images who looks somewhat similar like buddhabrot images. And not Ultra Fractal escape time pictures, throught Apophysis don't have many formulas to research and have just terrible interface if compared with UF. But fractal flames just looks smoother, deeper, more natural and more 3D. Just smooth pauldebrot renders can compete with fractal flames. Throught now Mandelbulb3D started to beat Fractal Flames, but it still are much high tech, and some like more natural pictures.
4th the most all times popular in deviantart, and IMHO the best.Anyway fractalforums is specific place with folks inclined towards exact sciences and having specific tastes for all new tech so deviantart with lots of professional artists could be a better indicator. Of corse my artistic skills are somewhat bleak, but I can allways criticise or appreciate others;)
Long time ceased to develop Fractal Explorer still beats Ultra Fractal when it comes to smooth aesthetics of the final result, throught UF have more content and layering. This should have very mutch to do with colours and colour mapping offering more effects than one dimensional gradient.
So alsou more beautifull colours, 3D colour effects would be right direction. Maybe Fractal Explorer like colours on 3D fractals.