At cdv's booth on GDC 2008's show floor Ascaron was showing off their Diablo-esque action RPG Sacred 2. The game features a massive, seamless world where the player is free to bash demons, level up, explore over 140 dungeons, and embark on hundreds of quests.
The most interesting part of the demo were the mounts. Each of the six character classes can ride a horse to more rapidly traverse the countryside or unlock class specific ones. The latter type allow characters to utilize a majority of their special skills while mounted – certainly useful. If you're to disembark the mount will follow you around, and can be dismissed and recalled whenever you see fit.