Maybe.
Right now I honestly can't say whether or not DragOnline or DungeOnline will hurt future designers.
I can see how it might, but after reading this thread, as well as a few others here and there, I can see how it also might help the freelancer since it adds another avenue for their works.
Paizo, via Pathfinder and such items, is going to be offering a venue for freelancers.
WotC, via the DI, will be offering a venue for freelancers.
Plus, there is always Pyramid, which takes both GURPS and d20 submissions. Not to mention, I think, TLG's The Crusader, and other such venues.
Nostalgia-wise, I'm not happy to see Dragon and Dungeon go out of print, hence the PR pummeling that WotC earned a bit, but as a freelancer the idea of yet another venue for potential work being out there, well I can't knock it too much.
If Dragon and Dungeon continue on in an on-line format, with the quality we've known them for still there, than I won't complain too much past the offering, aside from the "Cool, I still wish it was in print, though, but cool". statements.
Until the e-copy matches, or exceeds the ease of use print has, I'm always gonna want both, with print coming first and e-copy second.