Yes!
Yes again!
Human intelligence doesn't exist by itself, a human couldn't even possess a sophisticated intelligence if it were born in the absence of any other life form to learn from. There's no obvious way that we as humans could produce a machine intelligence, thatisn'ta reflection on the evolution of our own intelligence, thereby inheriting similar dispositions. Furthering along the aforementioned, that intelligent form would likely seek to multiply given the absence of a being near-exactly like itself, and in multiplication is where there could be conflict over scarcity of resources, theoretically (It doesn't mean there will be conflict, there are several millions scenarios, based on exponentially more variables). As far a time frame, well I'm not a Sooth Sayer, but maybe a ballpark of around 25 years for our technologies to reach needed levels and another 25 years for full development, and an sufficiently exhaustive reverse engineering of the human brain, but humanity could always find away to wipe itself off the face of the Earth,bewiped off the face of the earth, or descend back into the Stone Age at any given time before or after then.
I do not predict Machine Intelligence will come out of any of the clustered code bases that exist Today, I strictly see it as a proof of concept, but it seems very probable.