Part of the fun of it being analog, is that you know when a big change occurs. When the temperature drops a degree in the 10 minute interval, that's enough for a fairly visible movement of the 'needle', which catches your eye.
This is the beauty of it I think. You don't notice a big change in a digital display, it's just digits. But with this, there is a visual (and auditory!) feedback when a big change occurs, the bigger the change, the bigger the feedback.
But if I was to add more features, say maybe a switch to show the weather in different places, or a switch to show daily minimum/maximums, yes, the quick swing to the new temperature is very cool :-)