I can't find it now but about a few years ago a very well crafted CGI trailer for a project called "New Jedi Order" or something was about the interwebs and I think it was a school project for some animation students but it also offered solid "proof-of-concept" that a similar series post ROTS would look amazing. In fact, IIRC, it was mistaken for official and had some fans scratching their heads.
Sadly it seems Lucas doesn't want to go that time period at all. I wish someone could find the video. It was great. Looks like it's been wiped out from the internet.
So... we don't have a release date for S5 yet? just "October?"