If I were going to use a tablet (what is the resolution of the camera?), I would probably get a cheap digital camera and rig a tripod with it pointing down...
When I first check out you link, and had a similar thought (as I watched the video and she commented about scanning anything...going to the store, etc...), just carry a small, cheap digital camera...
However, looking at the specs, it can scan at +1000 dpi for 35", that's going to be able to generate an image on the order of 9000x35000 (somewhere around 315 megapixels)...that will best most cameras (but still, the camera is easier to carry around, point and hold steady, etc. etc.).
I still think a flatbed scanner is the best option, but there seems to be a dearth of large format, high resolution scanners in the consumer market... 
If you do buy it, please report back here with your thoughts and opinions.
I just tested the scanning app. It's called
Cam Scanner and was free (ad supported). Pretty amazing. My camera on this tablet is 8 mega pixels (if I recall correctly). The app also has an indicator to tell me if the camera is flat and squared up so there's no perspective shift in the image being 'scanned."
Once you have something scanned, you can then crop and select the kind of output from f color to bitmap to grayscale. it then creates a PDF that can be uploaded to the cloud or emailed. 'm glad I stumbled on this app because i can find uses for it on the business end.
On the cartooning end, this might work if I'm really in a pinch. but the wand would give me a better image and more control.
Here's the thing. when I create a cartoon/comic feature, I do so using a blue/non-photo blue pencil. Then I ink over the blue lines using pen and ink or a good black marker. I adjust my scanner settings and scan as a bitmap so only black and white pixels are being read. The blue sketch lines drop out. This saves me time because I don't have to erase pencil lines.
You can see the process in an old web site I built back in my Windows days.Okay the tablet scanner doesn't really get rid of all the blue lines. Sometimes, even my flatbed picks up some remnants of the blue sketch lines. but I can always adjust this. The wand and tlet method may not allow for this adjustment.
Which leads me to the REAL solution needed with any of the three scanning devices. And that is, CMYK for Gimp.
Allowing a scanned image to be broken into four parts/layers C (cyan), M (magenta), Y (yellow), and K (black) allows me to scan at full color, and just get rid of the cyan layer. ble lines would all drop out and I cold then save as a bitmap or grayscale. A much more clean process and the way, I'm told, I really should be doing all my scans.
Now, installing PhotoShop solves this. I have an older version that will run under Wine and give me CMYK. But the goal is to move away from these Windows programs. So, if someone knows of a very good and easy method of getting CMYK in Gimp, then regardless of what scanner I use, I'm good to go. Just scan in full color nd los the cyan layer. And if either of my flatbed scanners fail me, I have another backup plan with tablet or wand.
