"and in 2000 years the things that we thought were real will be laughed at"

That's my point. The engineering won't be laughed at; the science will. We don't laugh today at Greek siege engines or water organs or primitive water wheels. Those things were genuine advances.

And the only reason to call the classical theories of nature "philosophy" is that there was no strong division then between people who studied nature and people who studied what we today call philosophy. But when they were studying nature, they were using much the same strategies that are used by academic science today.