Writing software is too hard and it takes too long. Meteor is a new way to write software and it's radically simple. With Meteor it's possible to build a prototype in a day or two, and a real production app in a few weeks. It makes everyday things easy. It's accessible to the maximum number of people.
Never write the same data validation multiple times
Never code databases synchronisations
Never lose too much time to find a package
Configure a developer PC in a few minutes
Look at your code changes rendering in real time
Graphic designers become developers and developers can deploy without a system administrator
( spoiler alert : the reverse might not be true )
It's just a new way to write client and server code at the same time. It keeps in sync part of the database in the client for instant rendering. It's data on the wire only.
it's not fully ready to take over wordpress ( or is it ) but it's the best for any single page application
( and you can generate iOS and Android apps out of the box )
( they are here to stay )
and become a real time developer