I've seen 3 episodes so far and it's been enough to make me wonder why regular TV is such crap in comparison.
Ratings, aka eyeballs. And these aren't the L+SD/L+3/L+7 (Live+Same Day, +3 days, +7 days) numbers you see reported in the papers, no ,the netowrks buy the C versions of the numbers, usually C3, sometimes C7 (the difference is the program's rating is removed - the C ratings solely consist of ads). The programming+commercials numbers are provided for free, while the C numbers are provided by cost (it's how companies like Neilsen fund themselves). There is a little correlation - the C3 numbers generally correspond to L+SD numbers, but never quite exactly. So a programs' commercial viability is basically (as us mere watches are concerned) to those who watch it live, or within 24 hours of airing.
Network TV is funded solely by advertising so every show they put up has to attract the eyeballs. And when attracting eyeballs, going for the lowest common denominator means you have the widest market of eyeballs available.
Going after tech-savvy intelligent people is entirely stupid, as they're more likely to either download the show (no ratings), use a DVR and skip ads, both of which don't contribute to the C ratings. It doesn't matter how good a show does on Netflix - that's not the numbers the networks care about.
Netflix, OTOH, is funded by subscribers, and not commercials. So they need to generate good programming to keep subscribers coming back and paying their $9/month. Here the economics are different - Netflix needs to find out who its customers are (and in general, they're more affluent, tech savvy, and want programming that makes them think, or appeals to geek/nerd culture, etc), and produce that kind of programming to keep the money flowing in. Same goes for other subscription oriented channels like HBO. It's also why public TV (e.g., PBS) or state-funded TV (e.g., BBC, CBC) generally has better programming.
Now, if you look closely, you'll probably figure out why a la carte channels probably will be a race to the bottom - they need to attract cable subscribers, and those in general are more like network viewers so you cannot produce much high quality content as those don't gather eyeballs as much as the latest reality show featuring some big celebrity would. At least when they were bundled those speciality channels were insulated a bit from having to produce content that appeals to the masses and could spend money to make better programming. When it's instead all about getting as many subscribers as possible, well, you can see where it's headed.
As the demographics of Netflix change, so will the programming. Luckily this will take a long time so a show like Daredevil will be on for a while. Netflix will have to broaden its original programming in order to not just maintain its subscriber base, but to increase it.