Chris Martin always said they want to be Radiohead, he even called themselves "Coldhead" or something like that lol
i agree with I'm A ReasonableMan in the point they should experiment more with electronica for example, i also think they will, but hopefully it won't turn out into something very ridiculous.
Coldplay do have a big potential and talent, but for me it looks like they are still little kids (especially Chris Martin's media appearances and in some parts lyrically) who depend from someone else. they finally should find their own way (once again) that they lost in 2003-2004...