No... it won't. Developers for IOS only care about one thing and that is reaching the most devices possible. That is why even when the latest iPad Air comes out, games are still not as graphically intensive as they could be so that people with older IOS devices can still play the latest and greatest games.
Why would a developer spend their money and resources to cater to an audience that is a small small fraction of the total IOS community?
Apps will continue to be designed with the regular iPad, mini and iPhone in mind. If you don't believe me read some reviews of new games that have come out and then been updated with decreased graphics to reach a larger audience.
Most people assumed what you said when the first iPad came out. Most people panned it as "just a big iPhone". That perception changed rapidly. Developers will find ways to make use of the larger screen just as they did with the original iPad. To an extent it's a symbiotic relationship with developers. New devices and form factors come out, developers make apps which in turn sells more devices and thereby sells more apps. And I'm not sure games released a few days after a new form factor is unveiled really provide an accurate yard stick for what's going to happen down the line. I would at least give it a year to see if your hypothesis pans out.
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