"Add event invitation" in Gmail

Hi guys,
As we all know..Google tries every bit of it to bring something new to the user everytime
and this time Google has come up with something really cool.
this thing is
"Add event invitation"













with this new feature you can add any event like a reminder sort of thing which will keep mailing the sender.
isn't that cool guys..
i was just wondering that google should have some reminder sort of thing and just today google come up with this.Truly Amazing.