The actual post is not quite as reported
The actual post is not quite what was reported. The relation to "net neutrality" what he calls "carrier neutrality" and is with respect to how radio spectrum is regulated in the US. He would like to see the rules used for "C block" spectrum applied across the board to all wireless. These rules he characterizes as "no blocking" and "no locking". These rules prohibit carriers from limiting what legal devices can be used on their network, and to prohibit them from locking handsets or crippling features.
Apple is under investigation in Canada over forcing deals on carriers which prevent them from selling handsets from certain competitors or dictating that those handsets must be priced higher, so it's not just something that is emanating strictly from the carriers. This issue will have been at the top of Chen's mind when he was framing his argument. If people are not prevented from using whatever handsets they want on whatever carrier they want, then Chen can sell more handsets directly to businesses without worrying about what exclusivity deals that carrier might have made with other handset manufacturers.
The application and content neutrality comes at the end of his post, which means that it's the least important issue so far as he's concerned. Note however the inclusion of "content", not just apps. He doesn't go into details on this point, but I think the issue is mainly about Netflix not allowing their app to run on Blackberry (Blackberry can run Android apps with minimal effort), possibly due to exclusivity deals with other parties. Google's deliberate hobbling of Youtube on Windows Phone would make another good example, but he doesn't mention that one.
He's taking some subtle digs at Netflix here, pointing out that they are crying about being "net neutrality" on wired networks, while simultaneously blocking support on certain wireless platforms. He doesn't actually anywhere say that companies should have to port their apps, so I think what he has in mind is that Blackberry or some authorized third party would write the apps or port the Android app to Blackberry.
I suspect that his app/content argument will go nowhere, but I think he's right about the need for more consumer and business protection from carrier locking and blocking, and that applies to a lot of other countries besides the US.