What ideas has your company passed up because you lacked the resources to pursue them at the time? Companies often pursue the ideas they know are achievable.
Once the needs of the market are fully understood, many of those old ideas become viable. Sometimes it's a matter of looking at them in a new way. Other times it's a matter of having a reason to pursue an idea that may require more work to develop. Or sometimes an idea was ahead of its time, and now the world will be ready for it.
Whatever the case may be, it makes sense to capture every idea and keep them in a place where they can be used as a source of inspiration. Maybe create a library called The Cutting Room Floor or something like that.
Ultimately, an idea is only good if it satisfies your criteria. When the criteria changes, then the cutting room floor may provide you with a wealth of solutions.