Although Namco Bandai has yet to announce it, a PC port of Tales of Zestiria might be in the works. As can be seen in the image below, Tales of Zestiria was listed in Steam's database, although the title has already been changd to TOZ.
We will have to take into account that this doesn't confirm that the game will be released on PC, considering the fact that there have already been games that appeared on Steam's database and were never released. But considering that Namco Bandai has recently released other titles on PC, there's a good chance that the same will happen to Tales of Zestiria.
For now, Tales of Zestiria is scheduled to be released later this year on PS3.