FFIX Coming to PC and Smartphones!

[Mirage]

Not very interested, really, unless the backgrounds have been re-rendered. The bump in graphics would probably not be a lot bigger than you can get on an emulator, except the user interface, of course.
If the loading times for battle effects have been greatly improved, I might give it a chance. Perhaps there will also be some mods available that make the combat much more pleasant. That would also give me a reason to buy it, when the price dropped enough

The upscaling algorithm they've used on the FMVs is pretty decent, however, but we don't play final fantasies for those do we?

It only took them 16 years. Who says waiting on PC ports is consequential? Also, I'm wondering how they managed to get the FMVs to look that good in that trailer. They certainly don't look fantastic, but they look amazingly good to be cropped to 16:9 and then blown up to 1080p. They must have still had higher resolution versions of those videos lying around because there's no way those are the 224p versions from the PS1 game.

they were 320x240i, not 224p. These videos could still be based on those videos, with advanced interpolation techniques that use data from the previous frame to add more details to the next frame. The video is much sharper when there is little motion than when there is a lot of motion, which would be consistent with such algorithms. When there is little motion, more information can be recycled from the previous frame than when there is a lot of motion.

In addition, they have most likely also used algorithms designed to clean up compression artifacts, which PS1 FFs had tons of, and which also reduce the image quality considerably. With this, you could probably get close to "DVD quality" in some scenes, which doesn't look half bad upscaled to 1080p.

This would also explain why the background stills are seemingly of a lower quality than some of the FMV scenes. No multi-frame interpolation possible for those, as only one "frame" exists.

ps.
If you look closely, you can see that many single-pixel details are still very blocky, because these details are very hard to interpolate correctly. For example, Zidane's teeth at 0:30-ish.The amount of detail there isn't greater than in the original PS1 FMV, which it would have been if the scene was actually rendered at a greater resolution.