"I mean, sure, it makes your life as a website operator easier.
Good for you. Not my problem as a user, however. I don't care about making your life easier (nothing personal!); I care about mine, and "magical browser-based just works once you give a browser your master super-password" is BAD."
...Because website operators are the only people who have to create accounts on the Internet and log on to them. Sigh.
And to Sigivald and everyone else complaining about the high risk of having a master password that if hacked will give someone access to all your accounts - you already have one, the password of the email address you used to register all your accounts, as I'll bet that you don't create a new email account every time you're register an account on a website. If someone were to hack or guess its password, he would gain access to all accounts you created across the web by using the forgotten password feature.
"No. No no no no no. I'm sick of people behaving like websites are the only things that require passwords. Your "solution" offers no affordance for those of us with passwords on our Windows accounts (several at work and home), our phone lock screens, buildings, bank/telecoms telephone lines, etc etc etc. We need a password solution that doesn't require internet access. This "cloud-based" solution is completely worthless for a massive number of use cases.
And no, don't give me that crap about ubiquitous internet. Maybe in your country, but it's YEARS AND YEARS away from being a reality where I'm from."
...What the fudge are you going on about? Jeff is suggesting a solution to the problem of having to register accounts and remember passwords across the web, NOT a magic spell that will solve your daily life's problems. So why on Earth are you crying about how it doesn't magically solve problems that are far out of its intended scope? Do you send complains to companies that write antiviruses about how their software is useless when it comes to real life viruses?