No we're not talking HD ready 1080p/full HD in all circumstances. I'm talking 720p which my tv is or 1080i which is what these channels are broadcast in. You can get 1080p stuff in some formats if you want it.
You can get FullHD via vga or component in some circumstances. Sky HD (I think) and Virgin HD are both provided in either component or HDMI (you need HDMI for ppv and vod I think but that's a different matter). These are 1080i btw. There are differences between 720p and 1080i but bearing in mind some people are questioning any improvement at all from standard I think we'll leave that one for now. Component isn't as good as HDMI but it's still a damn sight better than standard def. It's not as much of an issue as they are making more tvs with x2 or x3 HDMI. With SCART you'll get good old fashioned SD, a mistake the numpty virgin meeja "engineer" made.
Sadly the Wii is not HD, about the only flaw with it and about the only obvious upgrade path for future Wiis someday. It still looks pretty good on a hd tv though.
One of my friend's mum is into gaming and reckoned all this high def stuff was a load of cobblers and that the x-box 360 was "no better" picture wise than her PS2. They got a HD tv and she changed her mind pretty rapidly on that one.
There's a noticeable mark-up still on FullHD tvs. There's a lot of tvs with half-baked resolutions not quite fullHD to save on costs. It depends what your definition of take advantage of is really and how long you envisage your tv lasting (debatable also!). There are non-obvious technical advantages to HD ready 1080p "full HD" over less than that. It will be many years before 1080p broadcasts because the tv market and some infrastructure in the UK is so thoroughly backwards.
My tv is 720p. 720p HDMI is the best setting, then 1080i HDMI, then component hidef, then the two scart formats and so on. Some of the cut down resolutions on digital are a joke and analogue can look comedically bad. Even flicking the settings on the V+ menu makes a noticeable difference. When it's in 720p HDMI the menu is very crisp, put it in 1080i and a very tiny fuzz comes in, a bit more in component and it looks bad in standard. The menu isn't even written in HD!
Thing is, some people reckon blu-ray stand alone players will be about £100 by the end of 2009 by about which time people might actually be interested in buying the things. I'm surprised that some of the retailers don't aggressively sell some of the players at much less than the current price as a loss leader as some of the high st retailers are being extremely greedy blu-ray price wise selling many at £23,£25 or £30 and they apparently sell some!