Hi I think alot of you are missing the point about the whole thing, you have been able to get BBC HD clear to air for years now, I have been viewing it via a sat card in my pc with no problems, and there have been other free to air boxes out there for you to plug into tv's.
But as was said above, the main aim for the freesat is to help enable the digital switch over, freeview has been around for many years now, however alot of us still cant get it such as my self. so being able to get all of these services via satellite is the only other alternative, and if you don't want to pay the sky tax then you didnt have much else, other than bbc / itv. now with Free sat you get a few more channels such as channel 4 E4 etc.. who have just started broadcasting clear transmissions via satellite.
As for the whole sky or free sat, thats not ture either, all you need is a Quad LNB so no need for extra dishes etc.. just more wires 😉 and then you will get the best of both.
if you wait another month or so then you will be able to buy TV's with integrated Free Sat Free View other Sat, and if your really flush you could plug in sky also and be spoilt for choice!