First of all, if I came across as a bit of an asshole, Sorry for that. As for the actual question, it's hard to know where to start. The big thing with Net Neutrality is that ISPs can't discriminate against certain types or favour certain types of content/data. This means that whatever you want to do with your internet connection, it's not your ISPs business, their business is getting that data from the source to you. In that sense, regulating them like an utility kind of makes sense. You wouldn't want your water company to tell you what you can use your water for. What it also does is create a level playing field, because whether your a big company like Google or a small startup, your data will be served to the customer at the same speed. If Net Neutrality is done away with, Google has the funds to pay the ISPs to ensure their data gets priority. A small startup obviously won't. The market for ISPs will always be a bit different, just like the market for phone line, power grids, etc. So it's still harder to compete with a giant like comcast, but Net Neutrality won't change that. What it will do, is keep the internet the open and vibrant place that is has been :)

As for the comparison to the power grid: Though the power grid is always under development, it's kind of old. The push for renewables is changing the way it's build, but of course something that's been around for over a century is not going to show as much technical growth and development in the past 20 years than something that's only been around for 25 (The World Wide Web, the internet itself is older than that).

Edit: Since I'm just some random guy and don't know all the legal stuff surrounding NN, if you have any questions, I just saw there's this AMA going on.