You can split the scanners I saw at the con into 2 general types. One is intended for digital conversion, and the other is a high end replacement for photocopiers. I'm not being snide; these scanners really are designed so the average user could just walk up and use them. It probably won't surprise you that all the models had features in common: a USB port and support for standard formats (PDF, JPEG, TIFF, etc).
Image Access are a maker of both types of scanners, and had both types on display. They had the biggest booth, and some impressive hardware. Unfortunately, they were also uncomfortable about me taking pictures. I didn't even try to shoot a video.
The image above is the KIC, one of their mid-range models. I watched a demo, and it's designed for a moderately tech savvy user. It doesn't just scan and convert; you can crop, cut & paste, and dedit the scanned image in other ways too.
This is the Bookeye, one of their more basic units. I fiddled around with it, and it seemed to have a number of settings that weren't set right. It's probably more important to note that it had a lot of settings, though.
The next image is one of their Opus scanners. I'd call it a mid-range model, but only because of how sophisticated the high end models are. As you can see, this one is intended for digital conversion. To get the most out of it you'll need to pair it with 1 or more computers.
This last image shows 2 of their best scanners. I was almost afraid to ask how much the cost, but I do know that they offer a scanner lab as a package deal for $125K.