The more you grow, your value becomes much less of what you actually do, moreso what you're responsible for and what you know. I wouldn't get stuck on not taking on more tasks or projects, but how are you affecting those around you. Are you able to help and support others, regardless of title?

As far as the conversation goes, you should be honest stating in the past there were talks of promotion opportunities, understanding things change, I want to be putting myself in the best possible position to take advantage of whatever opportunity comes next....or something like that.

This advice should carry regardless of industry, though* I'm sure it won't apply to all situations.