Unlike NASCAR which likes to bring out the individual driver more than the technology, Indy racing is far more showy about all the technology that goes in to all aspects of the race.
Telemetry allows teams to monitor and analyze amazing amounts of data like on tire pressure and drag. Aerodynamic analysis keeps getting more sophisticated. Technology allows for tracking of micro-changes of weather - humidity, wind, temperatures. Driver Cockpit displays keep evolving. Tire technology is optimized to get just 100 miles of super charged performance.
ABC and ESPN are leveraging Sportvision's Racef/x technology uses GPS data from IndyCar Series cars and transmits real-time data, including speed, acceleration/deceleration, time behind the leader, exact car position and RPMs to television viewers.
Microsoft's Channel 9 has a nice set of videos on some of the technology used by Target's Indy team.
Indy technology improvements show up on Main Street a few years later. Examples include tire improvements, and automatic manual
transmissions that can shift gears before you could push the clutch.
Gentlemen, start your GPSes. A refreshing bottle of milk awaits.