JukeBox Musicals Taking Over The West End

I have noticed recently that the West End is filling up with the JukeBox Musical, from the likes of Mamma Mia to We Will Rock You These musicals take songs from successful artists throughout their career and write a storyline around the songs. Mamma Mia has a very basic plot line with nothing really being resolved however, this musical makes people feel good. When I went to see Mamma Mia by the end of the musical everyone was up on their feet singing 'Dancing Queen.' Cheesy, but it made you feel good! However, with the JukeBox musical taking over the West End have we fallen into the trap of cheesy Americanised musicals or will we ever get a new musical that is authentic and original, something like Chicago, and not copied from a film or well loved songs by well known bands. The deaths of popular celebrities have sparked new musicals to be written. After Michael Jackson's death Thriller was created and now there are ongoing talks in creating 'The Body Guard Musical' after Whitney Houston's death. Where are the Andrew Llyod Webbers or Cameron Mackintosh's of this day and age!!!! Anyone?