Funny you should ask, Tony. I was there yesterday.
The dioramas are unchanged but spruced up, with video screens the size of the dioramas above them. The screens are so large that they are best seen from across the room. The whale is awesome, in the most literal sense of the word.
My favorite new exhibition is a display of models of various sea life, from microscopic creatures to corals and jellies and "filthy vertebrates" with a complement of well-thought out interactive screens. The screens display information relelvant to the model of your choice, and get fairly detailed, from size to related creatures and more about habitat and feeding.
The ceiling is really well done. It's now blue and white, changing as the surface of water would change, and sets a lovely mood. You can rent the room for parties of 1200 or more, so TONMOcon may have to share the space with schoolgroups.
Here are three photos.
Squid v. whale is the spooky diorama of the sperm whale and Architeuthis. Children's shrieks upon figuring it out periodically made me jump all morning. It's much darker and spookier in person.
Octodiorama has some visible octos and the reflection of the new ceiling. The blue light from above is delightful, but makes humans look ghastly.
You get to the hall of marine life through the hall of biodiversity. I haven't spent enough time in that room to understand how it's organized. It feels rather random, as the flamingos surreally fly past the squid and octo.