After two years of bronydom, I dreamed of ponies for the first time after reading this fic. So that's a 10 out of 10. I'm reminded of Eliezer's warning about imagining worlds so much better than reality that the act sucks out your soul.

In case you're interested in suggestions for improvement:

• Make this fic more accessible to others, not just super smart LW bronies - the text has words that could be replaced with more common synonyms, for example.
• Make it less silly. Computers in Earth's mantle and indestructible experience centers while possible are so impractical it's ridiculous. This isn't Star Wars!
• What about all the people who care about reality? The story conspicuously completely ignores them. I imagine they would petition Celestia to make physical pony bodies for them so they could continue their work on or study of the physical Universe. And almost everypony would object to the destruction of life on Earth.