Square Enix game director Tetsuya Nomura has elaborated on the choice to bring Final Fantasy 15 – previously known as Final Fantasy Versus 13 – to next-generation consoles instead of PS3, the original platform when the game was first announced in 2006.
In an interview with Famitsu (via Polygon), Nomura said Square Enix moved the game to Xbox One and PS4 because "the lifespan of the current generation of consoles was starting to pose a problem" to Square Enix. "We had originally thought about making this announcement last year, but due to assorted reasons that got delayed. This meant that the lifespan of the current generation of consoles was starting to pose a problem to us. If we were a year later, other companies will have more time to research the next generation, and releasing the game against their products on the older generation could have caused us to look inferior when people inevitably compared us."
Keeping Final Fantasy 15 on the current generation posed too many concerns to Square Enix – concerns that the final game wouldn't match what the company set out to do. "With current-gen systems, we couldn't fully express what we wanted to do in this project," he said. "There were more and more things that we would've had to change the form of. However, the assumption was that we'd go ahead with a current-gen release, so went through a trial-and-error process to do as much as we could. So we built an alpha version about a year ago, and the company response was 'If you remained bound to the current generation, will it will be the product you envisioned?' They suggested shifting fully to next-gen, and that was the spark that led to the move."
As for a PC port, Nomura says it largely "depends on the demand" – if enough people want it, then Square Enix may pursue it. The full interview can be read through the source link below.