I have a Canon 40D, 60D, and 5D, but I'll be getting an OM-D E-M5. My DSLR's are great cameras, but it gets to be a hassle to lug around a DSLR, especially for travel, because it's so much larger and heavier. Keep in mind that it's not just the body that is so much larger and heavier, but it's also the lenses too. I currently have an Oly E-PM1 with Oly VF3 viewfinder, and I love it. It's just so compact, light, and inconspicuous.
So in terms of "the novelty" wearing off, I take the opposite opinion: it's the novelty of lugging around a larger, heavier DSLR that has worn off for me. I still use my DSLR gear for my pro work, but for my own personal, casual shooting, I definitely prefer to take along my m4/3 camera and lenses.
It's also a lot nicer to shoot video with m4/3 cameras, particularly if you have a viewfinder, because you can look through the viewfinder when shooting video (which you can't do with a DSLR). Plus, DSLR's like the 60D still can't do decent auto focus when shooting video, whereas video AF is great on m4/3 bodies. Video AF in the 60D is practically worthless. That's generally not an issue for serious videography because serious videographers using DSLR's for video use follow-focus rigs, and manual focus. But for more casual video shooting, where you just want to point the camera, and start recording, without having to worry about focus, an m4/3 camera is much better.