This seems like a fair enough idea, except that there should be provision for "rich content boxes" that might contain images, forms, WebGL or other things that

This seems like a fair enough idea, except that there should be provision for "rich content boxes" that might contain images, forms, WebGL or other things that Gemini intentionally forgoes. Having a "web browser" that can't do interactive content at all (no, server-side CGI doesn't count) is a non-starter in 2020. What if I need an interactive chart?