I'll echo what's been said already.
In the future, as has been said, who knows? Especially with Pixologic being so mysterious with the whole Mac thing. Zbrush is currently the industry standard, but who knows. No news isn't good news anymore.
I will say that I absolutely love the fact that modo lets you sculpt on an actual mesh. You're not limited to sculpting on a vector displacement map. This has been very helpful to me in blocking out base meshes and even refining them. Even for heavy organic stuff, modo's sculpt tools are awesome on a mesh!
I think the hiccups start happening when you sculpt on a vector map. Not everyone is having the same experience there. But if you can get a workflow that works for you, sculpting in modo can be extremely rewarding!
I personally decided to go with Zbrush 3.1 and run it via Windows XP on my Intel Mac because it's the standard in sculpting and I want to be on the same page as everyone else. Mudbox caught my eye though...