Personally I don't care much about wireless book delivery.
When I buy books I like to check the editor and user reviews on Amazon and Books reviews websites. If I am looking for a book on a specific subject I will compare several books before deciding which one I want to read.
If it's a series, I will make a visit on the author blog or on its Wikipedia page to check the reading order, and to be sure that I will not be waiting 10 years for the final tome.
I don't see myself doing that on a 6" eink screen. I will rather do it in front of my computer. Wireless delivery would be a plus but it's far from being a deal breaker.
What Sony need to do is :
- Going worldwide.
- Improving pdf and epub support.
- Eventually opening more Ebook format (mobi would be great, even it for the moment I don't see them agreeing

)
- Reducing the price would be great too.
The connect store can't take Amazon by himself. But if we can purchase ebook for the sony Reader from a variety of site, it would leverage things a lot.
Especially as I don't think that it's in the authors/publishers/final customers best interest to have Amazon getting a monopoly on ebook distribution. We need competition to lower the prices, and an open format supported by all the devices on the market.