The basic intention of easy to remember is good, but at moment there is one thing missing.

If you give 3 people the same "paytome.coin" address, how will you know who was sending the transaction?

Now think of a store, where everyone sends to "storename.coin", with a lot of customers the storename has no idea whom to attach the transaction received to.

You will need to do something like "paytome.coin" + "purpose" where the purpose will have to have the ability and in case of shops need to be unique, what will lead again to difficult, hard to remember combinations of letters/numbers.
In case you just think of "hey can you send me some btc" you are right, easy to remember send to address is great. It think for bigger bussines its not enough.