WiFi ain't mandatory anymore. It rarely works with HD content...
Given the difficulty of having a fast and stable WiFi connections -totally necessary for high bitrate content as HD- since there are so many devices that will interrupt them a lot of people is heading towards PLC -name it Homeplug- which is a lot more stable and has reached speeds of 200Mbps with the standard Homeplug A/V.
Why force customers to pay extra for WiFi when I'm most sure many won't need it? Many mediaplayer manufactures are going the same path and I don't blame them. If anything I will change ethernet ports to gigabit instead which is a lot cheaper to implement since you don't need another interface and since its cost has come down tremendously lately.
I've been a sysadmin for the last 10 years and have seen many standards and until WiFi n is a complete market standard and prices come down for adapters wireless makes no sense for home or office. Only when mobility comes into account.