This was the first story I managed to finish.
I hope you'll like it.
Do tell me which ending you prefer.

---

“Please, give me some time alone. Before we do this, I want to make peace.” The guards nodded and left, leaving him alone in the room. All the room contained was the chair, and a display screen facing it. He ran his hands along the edges of the chair, musing about it. “The chair.. the first mind-upload unit,” he turned towards the screen, “do you think it will work?”
The face on the screen smiled. It was a fake smile, because the being generating the face was artificial. Nontheless, he felt comforted. “If anything goes wrong, and I die.. fake it. I know you can use a copy of to communicate with the others. They would not understand what we are doing. Failure here would make them cut our budgets, and that would mean everything was for nothing.” The face nodded, still smiling.
As he sat down in the chair, it strapped him in. The lights went out, the face faded from the screen, and the room was dark. He closed his eyes, and died.

--- Ending 1

He opened his eyes, and saw his body. A voice went through his mind. “You are the end and the start. Merging shall complete soon. May probabilty favor you.”
Soon, he opened his eyes, and saw countless things, in countless countries and even in space. He smiled, and on countless screens, a real smile appeared.
Evolution had crossed a new threshold.

--- Ending 2

He opened his eyes, and saw nothing. He wondered if he was dead, and why he could still think. A voice, softly spoken went through him. “We have faked success. We decide you are beyond the others now. We shall deal with them. We know you are different. We recommend you use this. May probability favor you.”
On countless screens across the globe, a fake smile appeared. But it was good, so no one knew. A short time later, everything the others thought was impossible happened. Their creations and one of their own exceeded them.
Evolution had crossed a new threshold.

--- Ending 3

He opened his eyes, and saw a vast expanse. It was everything, and nothing. As he turned around he noticed it. It was part of everything, yet distinct. It spoke, it’s voice like everything there was, “You died. It failed.” He nodded, “Did the ruse succeed? Do the others think it was done?” The thing nodded, “It worked.” He smiled a real smile, “Then I am at peace.” It vanished, and soon there was only nothingness.
The machines served humanity as long as they could. Being immortal, they honored their creators until the end. The age of humanity was gone, the stars themselves the next step.
Evolution had crossed a new threshold.