The new Canon 16-35mm F/4L introduced yesterday may not be as fast, but does offer image stabilization. Whether you think you need Image Stabilization on a wide lens is subjective, but it is $500 dollars less as still rated as an L series lens. [Found Here]
Canon 16-35mm F/4L IS USM Lens
The new Canon 10-18mm IS STM Lens is designed for EF-S mounts (APS-C) cameras such as the Rebel series or new Canon 70D. This can also be used on BlackMagic Cinema Cameras with EF mounts and at under $300 dollars a great option versus the popular Tokina 11-16mm (which does not have IS). The STM (stepper motor) means is should work well for auto focusing, especially targeted for use in video mode where you need full time auto focus. [Found Here]
I wasn't a big fan of the Canon EOS-M mirror-less mainly because it was announced at an $800 dollar price tag. It almost seemed like they were trying to target the more serious photographer. With all the other mirrorless systems available on the market (Sony/Olympus/Panasonic/Fuji/Samsung), the $800 dollar price tag was just too hard to swallow. Needless to say it didn't succeed, and recently there's been a price drop down to $599 which I think is still a bit too high.
And there you have it. Another Canon DSLR Camera release. The new Canon EOS Rebel T4i comes with everything we've already come to expect from a typical Canon Rebel camera including swivel LCD screen (it's now Touch Screen LCD with Swipe, Pinch, and Zoom support), but the stand out feature is the continuous Auto Focus in Video mode. That's a first for any Canon DSLR.
Although it can provide continuous Auto Focus to standard EF and EF-S lenses, the best performance happens when used with an STM Lens. With the Touch Screen you can actually drag your focus point around and the T4i will follow. Canon has available the 18-135mm STM Lens with the kit, or the Canon 40mm F/2.8 STM Lens is also available (found here).