Sweet, only $6 a month to watch something that is literally available for free. HBO is a premium cable channel; there's no legal way to watch it without forking over some dough. But I can watch CBS with a pair of rabbit ears. What's my incentive? Reruns of Big Bang Theory and NCIS? No thanks.
I had a laugh reading about that CBS announcement. Seriously? They offer me nothing, a single publicly-free channel and it's back-catalog. Yay.
The HBO online-only package has some weight behind it, but if it costs more than $10/month, it's absolutely worthless. And it sure as hell better include Cinemax content as well, at least, if they ever intent to charge more than $10/month, it absolutely must include Cinemax. $10? I can take HBO only - but content better be available to view at the same time as new content on the cable channel. I think there's enough there that I'd pick up that channel.
Ideally, give me AMC, HBO, Showtime, and Cinemax without cable, and add Netflix and Amazon (nice bonus, the shipping alone is great)... I'd have everything I want. At the same time, I would very much miss ESPN for college sports, as well as the BigTen Network.
As it stands, our cable company doesn't have a deal for Showtime's streaming service. Thankfully they have a pretty fleshed out VOD service on the cable box. When I was on my own with my HTPC DVR, I missed out on that but I also didn't even have Showtime. Unfortunate times brought a small consolation.
I like watching shows I had never watched before (over the past two months I've been catching up on Homeland from the series premiere - I'm now current

), but I also like watching shows as they air. One more method of small talk and I don't have to run away from so many random sources of potential spoilers. I might not watch a show that night, but I'll record it and watch it the next night.
I don't know if I could cut the cord entirely. I can sacrifice to make ends meet, and as I am budgeting, I am seeing it might be necessary to go internet only and rely on Netflix and Amazon and other sources.