It's fine. I don't mean to marginalize it as I think it's a neat device. What I meant, and I bet you and I both know, is that the cheaper 9.7" model will sell many more units. Starting at $799 you know full well that it will never come close to the cheaper sizes in market share. Here's how the early stages of app development work:
- Hey! I have a great idea for a new high-end "Pro" photography app on the iPad!
- Let's do some market research
- Turns out only 10% of iPad owners have the bigger 12.9" model. And of those people, only 40% are photographers. So 4% of the market. And by our estimates, we can maybe pull in 25% of those users from competing products. So 1%.
- Our app needs more power to run, so the 20% of the market which has the 9.7" Pro is unreachable for now. So it doesn't make financial sense for us to go to market right now. Let's come back to this at a later date.
That was just a crude, quick example of how those things tend to work. But you get the idea. So instead of 30% of all iPads being 4GB Pros, we end up with only 10%. And with the Air 2—a heck of a machine—starting at $399, you can bet that the majority of the market will be there. Sure some indie guy might come out with a great app, but it's unlikely that just one guy or a small team can some up with something super powerful and versatile for pro designers, editors, etc that could even begin to rival traditional desktop apps. Companies with the resources to make "Pro" apps are more likely to invest if there are more users capable of running them. The 2GB limit hamstrings a lot of things you can do in "Pro" apps, such as larger working canvases, more layers, complex effects, easily switching between canvases for different graphics being developed, the performance of music editing apps, anything that needs a RAM preview such as animation and video editing, etc.
TL;DR: It's niche compared to the rest of the iPad market, especially this early. Developers want to make money. The smaller, cheaper size will naturally be more popular, so it's unfortunate that they limited the RAM as it limits the types of Pro apps that companies will invest time into developing. They'll target the specs of the iPad Air 2 as the clear market leader.