Netgear hasn't set the price of its new paired HD video adapters, but promises 99.9 percent reliability for multiple 1080p streams: The High-Performance Wireless-N HD Home Theater Kit, which will ship in Q3 2010, uses a 4-by-4 MIMO array to achieve the results Netgear claims, and I'm inclined to believe them. The company says it can push 40 Mpbs across multiple streams using these adapters, with the video sources being the Internet, IPTV systems, or other devices on the network. The adapters plug into Ethernet ports, and have a simple pairing mechanism.
The 4-by-4 array over 5 GHz coupled with the paired adapter method means that Netgear doesn't need to focus on throughput but coverage and consistency. The extra antennas let them use space-time block coding and other techniques to boost marginal signals and reduce errors in transmission. The device doesn't compress data, so the entire goal is to achieve sustained throughput.
Of course, Netgear could charge $500 for the pair, which would make them ridiculous, but I suspect a price closer to $250 based on how other devices have been marketed in the past, and the target audience for these products. A third adapter can apparently be used to extend coverage further.
Netgear also announced a May release at $79 of the 802.11n (2.4 GHz) Universal WiFi [sic] Internet Adapter, a driver-free Ethernet-to-Wi-Fi bridge that can be powered by a USB port even though no data is handled over USB (it saves a power adapter). The notion here is that instead of buying branded, proprietary adapters, you can just plug into Ethernet.