My question is, besides the aircrafts callsign and altitude, does ADS show other information like the ETA of the next waypoint etc?
The ADS-B spec does indeed have provision for a TCP/TCP+1 message (Current/Next Trajectory Change Point) as Format Type Code 29.
This contains either a 3D (lat/lon/altitude) or 4D (plus Time-to-Go) description of the next TCP.
Having said that,
AFAIK it's not currently in use.