Sprint 4G?

So Sprint is advertising their new 4G service, but will it be on the Palm Pre? I don't know. Does anyone know? I guess I'm not even really sure if I understand 4G. It's faster and better equipped for data usage and media browsing, right? If anyone knows more on this, they should comment and let me know. That would be tight if the Pre did have 4G though, because right now the streaming video isn't always the greatest.