I think the good thing about some prosumers is the versatility. With DSLR, that means you have to have a few lens (at least 2) in order to cover the whole work, eg. macro, scenery...
I did a few shots of buildings, clouds, but most of my shots (well at least the "more serious" ones, not snap shots) are macros, but I also got a few scenery.
You really can't go wrong with a nice prosumer camera, considering the price is so much less than DSLR and minus the hassle of dust and heavy equipments...
But anyway, I have nothing against DSLR here, I admit that they are a much much better camera compared to prosumer, provided you have the skills.
If one is still learning, I think there is nothing wrong in starting with prosumer first, and then once they are more confident (and not bored with the hobby yet
), then they can go DSLR.
And considering the price of camera keeps decreasing along with better technology, I say just get prosumer and get the DSLR in the future. Hopefully by then, the price is even better than today's.