Well, this makes Symbian a lot less compelling than the iPhone, which Apple has periodically updated since it came out.
You're totally missing the point.
Symbian phone manufacturers could update the firmware every day if they wanted to, there's nothing to stop them doing that. The point is that it would be the manufacturer's decision, and nothing to do with the Symbian Foundation.
Symbian = operating system, not hardware
iPhone = hardware, not operating system
The reason the iPhone's firmware has been periodically updated is nothing to do with OS X. Apple could be running any operating system on the iPhone and it would still be entirely Apple's decision about how often they update the firmware.
All that N/A is saying is that the Symbian Foundation has no control how its operating system is used by manufacturers. Indeed that's the whole point of open source software, to allow others freedom to use software in the way they see fit.
Apple use open source too, their Safari browser uses the open source browser core WebKit, but that doesn't mean that Apple has to update the iPhone or update Safari whenever a new version of WebKit appears.
touch is only an interim step; voice is the real frontier. what could be more convenient than just telling the phone what to do. the less you have to look at the phone and touch things, the better.
I can see a niche for voice, but IMHO it will never become mainstream.
Next time you're on your local bus watch how many people are fiddling with their phones doing texts, surfing the web etc. Imagine all of those people saying out loud what they want their phone to do, or (even worse) saying out loud what their text message should contain. 😊
The fly in the ointment would be if Nokia were to deliberately starve the 5800 of resources to try to push people to buy the N97 instead.
The N97 really isn't an alternative to the 5800, they're totally different phones in terms of who they're aimed at. The only thing they have in common is the OS version, but in the real world most people base their decisions mainly on price.
The 5800 costs half the price of the N97. If the 5800 was "starved of resources", people would see things like Samsung etc touchscreen devices in the 300 euro range as viable alternatives, even if they were non-smart.