Is anyone really asking for four speakers? That's so weird to me. The iPad is also sized such that stereo speakers make less sense as there is less spatial separation for the sound. I hardly ever use the speakers on my iPad as I just use headphones and keep it muted. I'd rather it have more battery to support faster processing capabilities. Adding a flash just seems superfluous like they're running out of ideas, which they might be. I mean really, the iPad is rather feature complete hardware-wise. The software could use some work to make it better for productivity, and future hardware enhancements will help support that. But otherwise it's rather mature.
Personally I refuse to upgrade unless it supports the Apple Pencil, which I REALLY want. But even then I might wait another year as my iPad Air 2 is still pretty fantastic. That would also give them another year to make a better keyboard for that smart connector. Remember how bad the first-gen iPad case was? I still have mine and the original iPad. It's a flimsy piece of junk that was nearly impossible to remove. Then subsequent cases got better and better. I think the same will be true for these keyboards. I'd just like a "Pro" level machine in a smaller package, even if it costs more. But after trying out the Pro a few times, I must say that I like it more than I thought I would. I'm not sure how practical it would be day-to-day, but that display is amazing. But I don't think I need it, and would rather save the money to get accessories for the iPad Air 3.
The main thing is that iOS on the iPad really needs an overhaul to increase the productive workflow of professional users. If Apple wants to keep iPad sales from faltering, they need to make that software mature. Right now we have all this power—even approaching laptop levels of performance—and yet what can we really do with it? Basic office stuff, some drawing and some light photo/video/music editing. But what about managing an entire project with multiple media pieces that all have to come together?
I could never replace my current workflow for building websites on an iPad as it stands now. And maybe the iPad will never be that device? I have to make sketches, design some mockups to get the general look and feel down, installing WordPress on a server, SSHing into our servers, downloading a framework that I custom modify to suit WordPress in Coda, hop over to LR to edit some of the photos I or a colleague shot for hero images and lead features on different pages and save them optimized for the web, design some icons in Illustrator saved to SVG and have Coda watch the folder and publish changes, have my SCSS compiled automatically by CodeKit and uploaded, switch back and forth from Coda to FireFox, Chrome and Safari for testing—as well as different IE/Edge flavors in VirtualBox, quickly go back and forth from Word and various emails to import new or edited content into WordPress, and the whole time quickly chat back and forth with my team (as well as managing tasks and bugs via Trello), and on top of that have my entire project folder inside Dropbox so each time I make a change I have a 1TB cloud backup that also supports keeping multiple versions that I can easily work on from home if my kid is sick or whatever. I also do a ton of file management keeping everything nice and tidy and organized because that's what you need for a project. I mean, in some ways you can do most of these things on an iPad, but you can't just switch between them easily and manage your project workflow and organization of saving things to a common area. So either Apple has a long way to go, or they need to always keep the Mac around. I would be so lost if they stopped selling Macs!