I love wifi but as much as it has liberated network nodes from wires, it has also opened up a long list of new security issues. Wired networks will always be faster and more secure as long as both technologies are developed. Each will have there place and I couldn't live without both at home.
There are also the legal and ethical issues. Around here, you can be connected all day by jumping from network to network but do you have permission to use those networks? Is your data really safe as it's being passed across each of those networks? Who else is playing with the hotel network? How many other wifi nodes are trying to make connections to me in the airport terminal?
With the convenience comes some weaknesses. They can pretty much all be mitigated but that does require a higher level of understanding by the network owner.
The unfortunate situation due to wifi is that manyh people's home systems are wide open due to not learning the router settings or believing "I have nothing they are interested in". Still other's think "but I setup WEP or MAC filtering two years ago when I installed the router; why look at it again?"
Even when not connected, a wifi NIC left turned on can provide some interesting information about your system and can even be tricked into joining a network without asking you.
My own symbiot is an N810 which has a wifi network connection any time I'm near a trusted network I have permission to be on. When not near a wifi I trust or using a bluetooth accessory, both are turned off.
I don't think the technology is going away any time soon. So far it's continued to evolve in signal strength and system security.
I wasn't sure what your discussion point was about Wifi but it's a topic of interest for me so that's my initial two cents.
