Yep, as a Innoventions Presenter Host or Hostess, you're basically be facilitating the various exhibits within Innoventions at Epcot, as well as Mission: SPACE Race, the interactive experience located at the exit of the Mission: SPACE Attraction.
It's a lot of spieling, and I do believe they put a heavy emphasis on sticking to the script, because a lot of it is dictated by the legal agreements in place between Walt Disney Parks and Resorts US, Inc. and the sponsoring corporations. However, based on your experience, I think you'll be fine.
To top it off, there's a $1.00/hour premium rate for all Cast Members in Innoventions Presenter positions, which always helps.