Because of this, the kinetic energy effectively adds to an object's mass, making it progressively harder to accelerate. This affect can be seen in real-life examples as well: What takes more gas, accelerating from 0-10MPH in a car, or from 90-100? (Although yes, friction plays a part in that case as well)
Anyway, the speed of light is, in theory, the point at which any moving particle has infinite mass due to its kinetic energy, and therefor infinite energy is required to accelerate it to that point.
On-topic: If this is confirmed, it could throw a lot of what we know on its head, but that shouldn't come as a surprise in quantum mechanics. This is why nothing in science is ever to be taken as absolute fact before it has been proven.