Intel to offer ‘free’ Wi-Fi in its ultrabooks and tablets
gigaom.com
gigaom.com
That being said, I don't think those concerns are an indication that this technology is bad. It is an indication that security practices around free and open WiFi networks needs to be improved.
It is likely that this technology will be available before we see any real improvements to that sort of security, so hopefully the system would be easy to configure/turn off and would use sensible defaults to ensure it minimises risk.
EDIT: edited for clarity/grammar
"Would this be hardware-based or software-based? As in, what if I put Linux on my ultrabook, can I still avail of this feature?"
If your device is asleep during your commute, do you really expect it to have any charge left after driving through downtown and connecting to two dozen wifi networks?
Sounds like more Windows malware to me.
However, as you will most certainly be able to disable that feature, I think it is a great addition, since there seems to be no downside. If you do not like it, do not install it :)
I would expect any machine in sleep mode that is eyeing out for wifi networks to last considerably longer than my commute. Though I'm surprised they are able to keep searching for wifi while in sleep mode.