I guess it just depends. Right now all we have confirmed is Tomb Raider (which are already out) and The Last of Us. There is rumor of Mass Effect being re-released as well, but even if that comes to pass that's only three games. If all of a sudden we get a massive landslide of PS4 remakes then I'll call foul, but I'm not sure it is too worth looking at in a negative light at this point.
I mean Tomb Raider and The Last of Us were both recent releases, so they're basically just adding versions to the PS4 like Assassin's Creed 4 did, only with a decent delay. Admittedly, Mass Effect is a bit stranger and I don't quite get the reasoning for a PS4 port, other than they want it playable on everything. Personally, I don't think doing PS4 remakes will be quite as popular as they were for the PS3. At least I'd say that I probably wouldn't invest unless I had not purchased the game for the PS3 or if it was a game remake that added trophies for a game that didn't have them on the PS3. These would be my only reasons for thinking about buying it.
So is it hurting anything? With only two confirmed titles and one rumored I'd say no. I doubt they're taking away from the identity of the PS4, which to be honest won't probably be developed completely until a couple years from now, similar to the PS3. I don't want to see only HD remakes being put out, but we aren't and having 1 out of the ~23 games that have been released for retail so far isn't too bad in my eyes.
However, I'd say that seeing the indie games cross over from the PS3 or PC, is to me a completely positive move in my mind. But this post seems focused on the HD remakes, so I won't go on about that.