There's a difference between saying that Apple is not making a product with the best mix of features *for you* and saying that Apple is not making a product with the best mix of features *for them* (which is closely related to making the best mix of features for the majority of customers). You're well positioned to assess what's best for you -- I'm sure you would benefit from more RAM. But Apple is substantially better positioned to assess what's best for them and/or the majority. That doesn't mean they'll always be right, but in cases where you and they disagree, my guess is they are going to be right about 90% of the time.
There are plenty of examples where I wish Apple would choose features that are a better fit to my needs. For example, I'd rather that the Mac Pro had two Xeons and one GPU rather than two GPUs and one Xeon. But clearly Apple has determined that more of their pro customers would benefit from a second GPU than a second Xeon. They are much better positioned than I am to make that assessment, so I'm guessing they probably made the right call. It's not that I think they can't make mistakes -- it's just that I think it's much more likely that I will make a mistake in assessing what's best for them than that they will.
I hate to be the one to say this, but, Apple isn't always right. Hard to believe, I know, but true nevertheless.
And notice the people here talking about the problems with Safari. And yes, Safari does use a lot of RAM. That's true on the Desktop as well.
And it's not just me. Gaming companies have complained about the lack of sufficient RAM. I'm willing to bet that most people would benefit from more, not just me, and those like me.
But as I said, it's possible that 1GB is just sufficient on the iPhone. But maybe the new models will need more. From what I can remember, video shares RAM on these devices, and the more sophisticated the video /graphics processing is, the more RAM they will need.
At any rate, more is definitely needed for the iPad. And as Apple has done that before, they could choose to do it again.