Maybe Apple will simply increase the download limit
If you follow the goings-on of Apple, you probably know that next week is an event where the world expects the next iPad to be unveiled. The next iPad is expected to have a retina display with a resolution of 2048 x 1536, which is a much higher resolution than we have today. That higher resolution raises the question of whether or not apps designed to take advantage of the high resolution will be too large to download over a 3G connection.
Currently Apple has a 20 MB download limit on apps over 3G connection. If the high-resolution graphics mean significantly larger files, owners of the iPad 3 may be hard-pressed to find high-quality apps that they can download on the go. One example given by The Next Web is an app by Bjango called Consume 2.
Currently the app is 18.3 MB in size making it easy to download over 3G. The same app amped up for retina displays would be about 35 MB. That would be well over the current download limit meaning it can only be downloaded via Wi-Fi. We will have to wait until next week to hear all the details on this, presumably Apple could simply increase the download limit.