In 2010, the platform-as-a-service space looked poised to take over the world. There were so many startups, not to mention high-profile offerings by Google and Microsoft, that it was hard to deny the momentum. Four years later, well, PaaS offerings have certainly taken off for some consumer-facing web and mobile applications, but those sought-after enterprise developers still aren’t coming on board en masse.

Tod Nielsen, CEO of Heroku (pictured above) — one of the first PaaS offerings to hit the scene, back in 2007 — came on the Structure Show this week to discuss the state of PaaS and Heroku, and why he’s still confident those enterprise developers will make the switch. Here are some highlights, but it’s a good interview to listen to in its entirety if you’re interested in Heroku’s vision and how its technologies are fusing with those of its parent company (as of 2010) Salesforce.com.

And if you’re really interested…