What am I missing in not having a gyroscope on my phone, when using Photosynth or other apps?

Question

When I bought my Nokia Lumia 800, I was aware that it did not have a gyroscope or front-facing camera, but I didn't think they were that important to me.

Now that Skype is out I do miss the FFC, but I have never been bothered about the gyroscope until today, when I installed Photosynth.

When opening Photosynth I get a warning, saying that full functionality would not be available because of the lack of a gyroscope. However, it does have a compass and accelerometer, and the app works as I would expect it to.

How differently would Photosynth work on a phone with a gyroscope, like the Lumia 900?

What else is the gyroscope useful for? Just some games?

Answer 1

Gyroscope can improve the same data you already have. Some apps like compass apps would work better with this sensor.

I think gyroscope can precisely feel when you hang your phone with your arm straight and starts to turn yourself. I think compass fell when you turn only the phone in its own axis.

Edit:Testing Photosynth with and without gyro.

Answer 2

In theory using the gyroscope will be more accurate and wont lag/jump-around like using the compass+accelerometer found on the Lumia 800.

In real-world usage the gyroscope doesn't make a noticeable difference when compared to using the compass+accelerometer.