These don't really scare me, and I can see definite use for these when it comes to med studies (where researchers really should know for sure if the patients actually took the pills, as reported), and in the case of people who may forget to take their meds. My memory is normal, but I can't even tell you how many times I've had to sit and count out how many antibiotics or whatever are left to try to figure out if I actually took that one at lunch or not, then try to remember what day I started taking them.....
However, knowing that there are currently people who can't afford regular medicines, I don't see how this could really be cost-effective on any kind of wide scale.