I agree. Some of my tasks from multiple lists have similar names. Rather than having to add distinct info (such as project name, abbreviation, etc.) to the task title every time, it would be very useful to have this feature.

Agreed. It could be shown as tags are shown, but in gray to designate the folder, similar to how they are shown in the cloud.

Not to say anything against this suggestion, but perhaps as a workaround... since tagging was introduced, I keep all of my tasks in one list, and then slice them up via tags. If you associated the current listname as a tag with all of the tasks on a list, then it would appear in the smartlist, along with the other tags? Would that be a helpful step forward for you? To replicate your current list views, you could simply have a smartlist for each list that you have under the current arrangement.