You must always keep in mind that Evolution is driven by natural selection and that the results are limited by the laws of science.
Think of the super ability of being invisible. Some lower animals, because of being hunted by others, evolved something akin to invisibility - camouflage. But note that it is not this is not actual, outright invisibility, probably because such a strong trait in an earth-based biological system is either scientifically impossible or because outright invisibility is unnecessary given that camouflage is sufficiently effective.
Humans have not evolved camouflage because their other traits - such as intelligence - are strong enough to counteract most predatory threats most of the time. If we have not evolved camouflage then it's safe to assume we have no reason to evolve invisibility. After all, humans are actually the top killer in earth's ecosystem.
We will probably continue to evolve - perhaps in response to our changing climatic conditions and other future, unknown eventualities. But there is something special about humans that could serve to retard our evolution - our intelligence. Our great intelligence actually serves like a super trait that causes natural selection to be somewhat obsolete in our case. It's almost as if we have outgrown the influential power of natural selection. How so? As an example, if the climate starts getting colder, most other animals would be naturally selected to have longer hair to provide warmth. But humans would use their intelligence to develop better clothing, thus negating the normal effect of natural selection favoring only the survival of progressively hairier humans.
The x-men type traits would not be naturally selected in humans since current human intelligence would already enable them to have such abilities in the form of more modern weapons technology. Future human evolution would only be those necessary areas that humans are unable to address with their technological prowess. Natural selection favors the survival of variants most suitable for their given environment. But a variant that is natrually and physically unsuitable for an environment can actually be the most suitable for an environment if it can artificially adapt to it's environment with the use of technology. This is what humans are doing.