Sorry but I think you are confusing mass produced "client" USB devices with something closer to a router in complexity. Good routers run about 100 bucks or more so we have a low volume device here and it's price is not getting the price crush of mass production.
Here I'm using Wireless HDMI but that's not cheap either.
Hello there, I was searching the internet for a while, trying to find some cheap way to connect my tv and speakers with my laptop without cables. I was thinking to do it (not sure if it's possible, but why wouldn't it be?) by using vga to usb converter, where one (vga) connector would go into tv, and the other, converted, usb side would stick to the usb hub, and then, wirelessly to laptop. Speakers would be connected to the external usb sound card, which would be connected to wireless hub too. The only thing I was able to find was some products from "Belkin" (like this one http://www.amazon.com/Belkin-F5U301-CableFree-4-Port-Dongle/dp/B000LP9RQC) but the price of 200$ was not exactly what I was looking for. I mean, u can find some wireless mouses on ebay and everywhere else for less than five dollars (work method is the same I think, they use 2.4Ghz technology just like usb hub), so why this thing would be 40 times more expensive?
You are satisfied with hdmi wireless adapter? Actually, I never saw that revolutionary device called chromecast, so I think I'm gonna get it, and for the audio, there are some cheap bluetooth adapters with standard 3.5mm plugs.
Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic