This is an extremely strange comparison to me. Web is a standards-based, implementation independent platform. That is completely, categorically different from

This is an extremely strange comparison to me. Web is a standards-based, implementation independent platform. That is completely, categorically different from Unity, which is a proprietary tool for making applications. Unity isn't the browser, it's web-flow or square-space. Except it doesn't give you artifacts which are interoperable with other tools at the end.