Today, Log Insight comes with the vSphere content pack to give you information about your vSphere logs. In the future, additional content packs will be provided to give you information about other types of logs messages. In the meantime, you can extract meaningful information from your log messages from the interactive analytics page. From there, you have the ability to extract fields, construct queries, apply functions, group information, save dashboards, and create alerts. In short, you have the ability to do this today.
The more information you can provide about specific use-cases the better. For example, what are you trying to do that you cannot and why would you like to do that?