You're not thinking about all the great features that sets OmniWeb apart from all other browsers... Yes, they _should_ still charge for it. And you'll still be able to use it for free once it's finished.
After reviewing OW's features page, these seem to be the features that OW has that Safari and Camino currently don't (but both are beta still, so this isn't set in stone)...
1-Ability to block standard banner sizes and prevent animations from looping.
2-Searchable history. This is coming to Camino, and I think it's already available in Safari, no?
3-Auto Updating Bookmarks. This is probably the biggest OW feature that I miss. OW's implementation was even better than IEs. My guess is Safari will have this before version 1.0 comes along.
4-Automatic Spell Checking. I don't think Safari has this yet, but since it's a Cocoa app, it should be pretty trivial to add it. Should arrive before Safari 1.0.
5-In Place HTML Editor. If it was functional, I'd call this a feature... But OW's HTML Editor was so basic, I opted for TextEdit most of the time. About as useful as Mozilla's composer, which isn't saying much.
So, out of these 5 OmniWeb only features, only 2 are worthwhile (for me, at least - your mileage may vary).
Now keep in mind the stuff you lose with OW versus Safari, which is still adding features with every release up to 1.0...
1 - Tabs. Sure OW will probably have them... But right now, Safari has the best tab implementation of any browser. Will OW duplicate that model, improve upon it, or fail?
2-Autocomplete. Safari's use of the Address Book for Autocomplete is sheer brilliance. Camino is going this route as well. Hopefully so will OW and IE...
3-Superior bookmark management. Again, Camino is following Safari's lead here as well. Will OW?
I still think OW has a place in the Mac browser ecosystem, but with it's adoption of Webcore, it now shares 75% of the same app DNA as Safari. And out of the remaining 25%, will there be enough to convince people to pony up for the license?
As I've written elsewhere, the whole Mac OS X browser landscape has shifted. In some ways, third party developers had it better when IE was the default browser. Microsoft IE left a void in the market that was being filled by OW, Camino and to a lesser extent, Opera. Now that Sarari exists, third party developers know that Apple will work hard on making it the browser to beat, unlike IE, which was just good enough to use.
Safari was even instrumental in changing the Mozilla roadmap from a huge bloated browser/email/composer/calendar app into the svelte, trimmed down Phoenix web browser component, which will soon be the Mozilla project reborn. I wonder if the other browser developers will re-evaluate the landscape and adapt, or continue as they have and hope for survival...
At any rate, it'll be real interesting to watch...