Players are demanding Open World MMORPG's and Horizontal Progression. Character Progression is the most important form of horizontal progression because players treat their character like a in game avatar. Gear progression is a second form of horizontal progression the main problem is with limited inventory space we will eventually run out of space. Both end up turning into grinds at end game regardless but we can tract or progress because we know the preconditions to getting a new piece of gear or an ability point.