Infrared links, could make a comeback and possibly replace Wi-Fi, thanks to a new low-cost optical "aerial," called a "concentrator," that is capable of ~50 times the performance of a standard lens and can deliver much higher data speeds.

The Full story HERE

Does it work through walls? No need to answer that one.

Next time read the article before responding.

Very interesting article, StormBringer. The security aspect will likely be a major plus when compared to WiFi. Still, you know there will be bumps to smooth over. (Diffussion rate, etc.) In the long haul, some healthy competition should make all parties strive to be their best.
That's usually a good thing.
Definitely worth keeping an eye on.

These are major down points, but they play them off as benefits. This is fine for special-purpose networking needs, but with drawbacks like these, it will not be replacing Wi-Fi ever.

i wouldn't be so sure wifi won't be replaced. i have holes drilled in my ceiling and floors and have internet connections running through my entire house. who the hell needs wireless (cable wires are also slightly faster than wireless too)

and i have no offically, forgot if this was on topic

If you want security, and your equipment is in the same room, then use a cable (as already mentioned). I really can't see IR replacing WiFi. It doesn't have the convenience. If security is a concern, then use encryption with your WiFi network. Better encryption technologies for use with WiFi are the way forward, not IR. Infra Red can still pass through glass, so if your room has windows, then security is still a problem even for these systems.