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I do. I expect the 24/2.8 to cheaper than the 28/1.8 and much sharper. The 1.8 is known to be a turd in sharpness. A 24/28mm IS lens is a great FL to do street and landscape photography and when stopping down to F8, one has IS to compensate.
Of course if it is expensive, it defeats the purpose of the lens (small and cheap)
A revised 28mm with IS will almost certainly be as much as the older 28/1.8. And the 28/1.8 may be a "turd" at F1.8, but stopped down to F2.8 it will probably be very close to a revised 28/2.8.
Given all of this, plus the fact that wide angles just don't benefit a whole lot from IS, I would barely see the point to such a lens. That said, where the heck is the 400/5.6 IS already? Canon is really hard to figure out sometimes.