As a relatively happy dSLR user I'll disagree with you there. A decent EVIL (electronic viewfinder, interchangeable lens... not sure if this is a well known term!) camera can take the place of any other sort of camera with the exception of a super compact (it won't ever be as small) and it can perform most camera uses with the exception of sports/fast-paced photojournalism (because the autofocus is too slow).
You can put on a big zoom for wildlife or event photography, you can put on a macro lens that will vastly outperform anything on a non-interchangeable lens camera for small subjects and product photography, you can put on a mid-range lens for 'every day' use, you can put on a wide-aperture fast prime for evening/indoor events where you don't want to use flash. At all other times, you don't need to deal with the inconvenience of the features you don't need (eg, the bulk of a superzoom) and the whole package can still be reasonably discreet (with a pancake prime lens it'll be pocketable).
Like as not you'll end up with better image quality (which is utterly irrelevant for most people, but useful if you're making medium-sized or larger prints) and better low light performance than any smaller sensor digital camera (eg, any of the kinds you listed) and a device which can still do more things and do them better than a combination of super-compact and super-zoom.
"Bridge" cameras look a bit naff by comparison, superzooms too bulky when you don't need the zoom, and normal zooms not particularly versatile. The only thing that might be more useful for most people is a decent super-compact, because you can take it everywhere really easily... and people seem to prefer using their phones for that!
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