Why would you want to get this in an email? I try to keep my incoming email to personal communication, and push any content consumption into RSS. Emails are for urgent stuff, and consuming this sort of content is anything but urgent.
I run something similar, http://hackernewsletter.com, and almost 30,000 people want that email each week. :)
I can give you an Inbox invite if you're curious about what the gmail team thinks the future of email looks like. It is a platform built around various functional groups that email is used for, which may or may not be urgent.