I don't have a lot of time right now so I cannot get very in depth, but will provide more information from research a little later.
But quickly looking at that information shows it's just an earlier hominid, though with teeth less chimp like, this makes a ton of sense. Chimps evolved separately from humans, scientists have suspected/known for this a long while. Though, the skull structure is decidedly similar to other primates than humans. It appears to have less room for the brain, and more focus on jaw strength. Humans evolved for less jaw strength, thus less need for muscle, which gave more room in the skull for the brain.
Here's a chart that shows the theorized evolutionary pattern, and I see nothing with this new find that suggests it should be changed.
tree
notice chimps were from an evolutionary split AFTER the split that led to humans. At what point gorillas split from the same ancestors is what is going to be up for discussion, and exactly how many genetic changes there were that allowed for the tree to move like that is anyone's guess.
One ancestor could have led to 3 new species, one of which died out before continuing the evolutionary chain, two which began the process of leading two separate branches. Or anything similar to that. And how many evolutionary leaps it took for species to begin resembling the modern day examples of those evolutionary trees is where things get confusing.
This newfound species could have been simply another part of the evolutionary chain leading from the common ancestor toward modern human, with no known other branches from those species. Thus, if it feel into that category it would change absolutely nothing.
It also could have been a single generation that was unable to breed. We have no idea how many of this specie existed, and how it contributed to the ancestral branching.
Regardless of all that, it definitely doesn't appear to change anything, but it does provide another potential link in the chain that led to us, most definitely. But it might not be a creature that served as a common ancestor for multiple species that led to different evolutionary branches.