slooksterPSV, I don't think you know exactly how many members you just offended with your sweeping generalization, but neither do I.
I don't think that a professional web app is in order, but one must wonder about who is actually using GoLive and Dreamweaver daily. If they did a web app, it would probably be something that managed websites more than created and laid them out. Although it's been "years" since I really used Dreamweaver, it has some really nice tools that make some things a bit easier to manage a website (like having a template file; you can replicate this with PHP, but it could be easier for some with Dreamweaver).
They also might take advantage of some of the web apps available today, like integrating your Flickr photos into your own gallery, or using Scriptaculous scripts for effects. I think that since the web tends to change rather quickly, the program could become outdated rather quickly as well.
WebObjects, from my understanding, is more for server apps than anything else. There could be a feature extension in WebObjects, but I think Apple would keep one app doing what it does best.
I wouldn't expect one, but it wouldn't be the most shocking thing in the world.
-Chasen