It's just not that simple.. you could argue
1. Wifi - this is the worst network connection, and adds typically 10-30ms latency, which is not ideal.. plus differing chipsets etc often interact and create dropouts, etc.. I have a wireless AP in my house for surfing the web etc, but I would never dream of connecting my console up to it..
2. Gold Live subscription can be had cheaper on Ebay and promotions, and it offers a much better service then PS3 online. Developers don't have to write hardly any code to use it, all the servers/bandwidth and QoS are pretty much guaranteed, and it scales very well, almost all 360 games offer online gameplay.. in contrast the PS3 online in it's initial phase seems to have limited games offering online play, and who is paying for the bandwidth/QoS/Servers? to be any good, I can't see it being 'free' for long, it just doesn't scale well, and I can't see Sony or Game developers stumping up large amounts of cash for it, that eats into their profits..
3. The 360 can play films from external harddrives/have HD films streamed to it right now.. For streaming you now only need a PC with XP or similar to stream WMV-HD's, and with a media centre edition PC you can stream a whole manner of HD material..
4. It's not clear who is going to win the HD-DVD/Bluray 'war', and some films will only be available on a single format, hence you really need both players to play all your fav films..
5. MS are starting to offer TV episodes and HD films via download.. yet another source of HD material.
I'd say it's very difficult to know which way to go which seems independant of console price..