What are the advantages of electrostatic versus floor speakers w/wo external drivers?

Are electrostatics considered the next level with a corresponding price bump, or just an alternative technology?

I've had floor standing speakers with tweeters and midranges on top of the box and others with all drivers inside it and found the only difference in listener positioning if you are right in between the speakers changing a record, the speakers with internal drivers are missing something.

The electrostatics I'ver heard have had sub woofers, which I guess would require an extra amp and crossover, and for a big enough room may be an ideal option. They seem to have a bigger, more open and detailed sound, but that may have been caused by the room size.

Just planning for the future....