I would imagine the appeal is less towards native/fluent speakers at this point, and more for people who are learning or uncomfortable with english grammar.

I have several friends who use Google to as a first editor of their grammar by making sure that phrases they aren't sure are correct return lots of search results. This seems like a convenient way for them to streamline that process.

That's really a clever trick, though my initial reaction was horror at the idea of checking one's grammar against the Internet.

Looks like Scribe is only looking one or two words ahead, though - it's not actually checking what you've written, just throwing the Google Suggest box into your writing.

I use it all the time to check difficult words. It works well. Google usually even suggests "did you mean" the right spelling when you get it wrong.

This works especially well for words you can’t find in the dictionary or when you want to know whether the context in which you use a word is appropriate.

Most of Google's users don't know how to touch type. For hunt-and-peck folk, this is a huge time-saver.

On a desktop keyboard maybe, but I'd much prefer this method of input on a phone with a touch-screen keyboard

Try Swype.