Copilot is still very new and as such the pace of updates and wider use across the Microsoft 365 estate is ever changing and evolving.
Copilot in OneDrive is one of these upcoming changes. Using Copilot directly from OneDrive (consumer and Enterprise) will allow you to ask open-ended questions and get information from files in your OneDrive without having to open the files first.
What is also really cool is that it will let you with with one or multiple files at a time. It will support files with DOC, DOCX, FLUID, LOOP, PPT, PPTX, XLSX, PDF, ODT, ODP, RTF, ASPX, RTF, TXT, HTM, and HTML extensions.
According to the Microsoft 365 Roadmap, this is expected to start rolling out in May 2024.
You can read more by checking item 381450 on the Microsoft 365 Official Roadmap.
For the rest of the updates in public roadmap you can check here.