It might just be me bring cynical, but it occurs to me that abolishing plugins also handily gets rid of such plugins as no script, adblock and all its other varieties that help put control over the browser in the hands of the user.
If I don't get to control what does and doesn't run in my browser, I'm not going to use your browser.
As an excellent example,vcertain advertisers have gotten wise to the fact that unmodified Chrome auto-runs embedded html5 video, while flash and its ilk are click to run. However I couldn't see any option to do the same to all videos. As a result I'm now finally running adblock again having earlier gotten rid of it and filtering by blocking flash content instead.