I dislike the phrasing of the question at hand. Is Flash gone? No. So why would I "miss" it? I assume you meant something more like "What do you think of not having Flash on your iPad?"
The current version of mobile Flash 10.1 (the beta with the pre-release Froyo) has problems. It doesn't support hardware decode so it strains the CPU, increasing heat and power consumption and sometimes has trouble dealing with higher quality content. It presents a scenario where more of a page needs to be loaded, making it slower than a browser without Flash support. Yet, I'd rather have that than none at all, keeping in mind that the current version supports Flash on demand, only loading Flash objects specifically allowed by the user during runtime - really, this is the only usage scenario that makes sense for a mobile device.
I think back to the keynote and the advertisements that proclaimed the iPad as "the best way to experience the web" and yet have to avoid certain sites because they use Flash-driven navigation. I have the 3G model and have on several occasions used it to locate nearby restaurants when traveling. We try to look at their website for more information or a menu, but they use Flash for their site. This happens all the time; nearly every restaurant it seems in my region uses (the much easier to develop for) Flash for interactive content. I try to look up product reviews or check out a live stream from an online community, but they've used a video service or live chat service that isn't supported by the iPad.
Don't get me wrong, I really do like my iPad, but Flash is still very much a part of the current internet. There are certainly valid arguments against using it, but why should that decision be left out of our hands? Android users will be able to install it if they want to, remove it if they don't like it, or not bother with it altogether. If HTML5 really is that much better, what harm is there in at least allowing a choice to include Flash?
Would I miss Flash if it were eliminated entirely? Well, if its successor is installed such that absolutely no loss of functionality, no compromise in available content, then probably not. I care about what I get to see and use rather than the underlying mechanics. If most of you blindly (rather arbitrarily) view a webpage on a computer, you won't care what tool was used to get it there just that it works and you can see it. In lieu of that scenario, damn straight I'll miss it.