Innovation is when we need to do something differently. Stagnation is when we are tired of doing the things the same way.
Furnitures used to be expensive and take ages to build, but since people change their habits and moved to difference places frequenter, the stagnation and frustration raised.
Think about the change you want to introduce in the world.
Is there a huge frustration in the way people are currently using a service or a software?
Only when the time is right, you will be able to introduce the feature and capture that market.