Why should you move to HTTPS? (top 5 reasons)
blog.movingtohttps.com
blog.movingtohttps.com
However, not all sites would technically need this. If you have a small blog for instance where you want to show off a few pics of your garden or baking or something and users aren't logging in anywhere or buying anything, the utility of a secure website is a bit less and it's not absolutely critical. (still useful to have as you can guarantee that the ISP doesn't alter content I guess)
My main concern with this https movement is that it adds up another barrier to buying a domain and creating a simple small blog or website. It encourages normal folks to just say "all this extra work is too complicated! how the hell do I set up an SSL certificate and deal with this stuff?" and they just say screw it and sign up for a Facebook/Twitter/Pinterest or other walled garden which is bad for the open web.
The answer is to make this https process as simple as possible, but I still think this sort of thing is an extra minor barrier that contributes to the open world wide web of random small website gems slowly dying off.