What's that you say? You love Minecraft's neo-retro styling but wish it flexed more of your super-expensive gaming PC's copious muscle? Well, first of all, you need to speak up; it's very difficult to hear someone through the Internet. Secondly, Sonic Ether's Unbelievable Shaders mod for Minecraft is exactly what you're looking for.
As seen above, the mod adds dynamic shading effects as well as more realistic movement to vegetation and fire, and best of all, hyper-pretty transparent water cubes. While not yet fully optimized, the latest build of the mod is available here. Sonic Ether warns on his Facebook page that the mod is not bug free and should be used with caution. Conversely, older, more stable versions of the mod can be found here.