As a content manager I want to use the dynamic content/personalization capabilities of a collection and collection provider. I can do something similar with the asset publisher and collection display widgets, so work arounds exist. Those widgets tend to assume multiple items are being presented. Web Content Display widgets are nice because they only display a single thing, and thus often get prominently used in content pages. The more personalization options in our widgets the better, I say.
Also worth including is that as the Analytics Cloud provides more and more suggestions about which content to display, those suggestions are likely to be provided via collections for the forseeable future. By adding Collection support to Web Content Display widgets, they also become connectable to the AC and content suggestions.
Thanks for listening.