Games and applications were evolving at break-neck speed and the pace of change really made you feel anything was possible. Encarta was really a product of that time.
If you were doing primary / secondary school during the 90s, you'd have had to do projects where paper encyclopaedias were your primary resource. For me in a rural school it wasn't until the mid 90s we had 486PCs with CDROM drives and going from Britannica to the searchable rich media database that was Encarta was a massive force multiplier. It was a remarkable demonstration of how positive an effect technology could have on the learning experience.