How are we going to design iPad views on MacBooks?

1440x900 resolution on the common 15" macbook pros was a pain while designing the non-retina ipad views. Now the "resolutionary" retina iPads with 2048x1536 displays make it even worse.

Here are a few of options:

1) Apple has to allow us to use the iPad screen as an external monitor; or at least an extension to the Xcode, so we can design directly on the iPad.

2) Isn't there a business opportunity here? Wink wink, ycombinator.

3) We will all need 30" monitors! Who's got the 13 hundred lying around?