This is the start of what I was worried about when the Oasis first came out.
I tried it but really didn't like it (mostly because of the shape and the return of the page turn buttons) and sent it back after just a few days, going to back to my Voyage, which I liked much better. But I said at the time that the real concern was that in the future all the new specs would be limited to the Oasis, as the top of the range model, so if you didn't like it you'd get left behind.
Not everyone will want all the new features of course, but that's not the point. Suddenly, the Oasis is the only 7" screen, the only waterproof kindle, the only one with built in Audible, the only one with optional storage sizes etc. The only thing I wouldn't particularly want or need is the waterproofing, but if they bought out a Voyage with the other improvements, I'd be pre-ordering right now.
The only good news is that it seems like the new fonts / bold options are going to be more widely available. Maybe I'll be proven wrong, but I doubt any of these other enhancements will turn up on the lesser models. And having had virtually every model of Kindle going (apart from the the first which wasn't available in the UK) I feel frustrated and disappointed.
