Seems reasonable, though given the size of the file I'm probably going to have to host it somewhere for seeding purposes rather than just parking it on my home fileserver (yay Comcast monopoly in my area).
If that were the case, how would the data input into your cell phone get stored on the card? I believe at a minimum Coin uses BLE to transmit card data from your phone to the device.
Having spent a fair amount of time in PhoneGap, I recall one of the tricky bits of using stringByEvaluatingJavaScriptFromString to call into JS land was that it could block, leading Apple to impose a 5 second timeout on that particular API call. Is that still the case? I recall that making loading large objects created/fetched via native code more complicated.
The accuracy is definitely a mixed blessing - interpolation, velocity awareness, and (screen-independent) gestures go a long way toward a good user experience.
The device can be positioned anywhere you like, but I'm guessing there's a definite learning period if you have it somewhere other than under your monitor (sort of like what I imagine Wacom users have the first time the use a screen-mapped tablet).
It's also possible that medical applications (and, by extension, deploying the hardware in a hospital) would require them to have a whole different set of dev, manufacturing, and QA procedures, much like flight control and other "mission critical" software.
Fascinating. A bit of digging suggests the founder, Ross Nochumowitz[1], has a second business as well: Big Boyz Bail Bonds[2] (note the identical avatars). He was CEO of the latter as recently as October[3].
Never having utilized the services of a bondsperson, I'm not qualified to comment on the similarity of the two businesses. Perhaps Ross can comment here!
It's viable. Drivers exist for most of the interesting storage engines you'd use for user records, leaderboards and the like. You'll need to pay attention to any server-side operations that require heavy CPU and ensure those tasks don't block time-critical operations.
You may or may not get the same level of concurrency as someone's custom-tuned C++ backend, but you won't have to pay an arm and a leg to license it, either. :)
Found this[1] as well while poking about - fairly tall structure, unique curved shape, nothing but a road, some outbuildings and some antenna masts for miles in any direction. Thoughts on what it might be?