I look forward to a mixture of satellites, including a geo-bird. The geo-bird would allow for system testing with a known source at a known position. The presence of a beacon(s) up above the horizon would mean it would be an excellent source for antenna testing, antenna contests, receiver development, beacon data demodulation development, etc. And, for beginners, it eliminates or drastically reduces two variables to getting on - easy tracking and Doppler compensation. Then, they could move on to more complicated antenna and receiving systems. The satellite could also be used for disseminating important periodic information - even live transmissions from AMSAT conferences.
My two cents,
John WA4WDL AMSAT 10211