You're too old and jaded [1]. It's for kids inventing infinite worlds to role play and adventure. They're going to have a blast.
[1] Not meant as an insult. Working professionals don't have time for this stuff.
> Working professionals don't have time for this stuff.
Why don't working professionals have time for entertainment?
And are working people not always professionals?
Object permanence and a communications channel is enough for this. Give children (who get along with each other) a pile of sticks and leave them alone for half an hour, and there's half a chance their game will ignore the sticks. Most children wouldn't want to have their play mediated by the computer in the way you describe, because the ergonomics are so poor.