I think we've got the best of what we can have really.
For the UK industry, we were saturated with theme parks/leisure parks and as seen recently, they've been closing allowing the others to thrive better.
I would say we've got the middle man - we don't have Six Flags with their awful way of investment (though, we almost did the way tussauds were going). However, we don't have the size or capacity to bring in the funds the big players have in America either. We won't see 40m being spent on a dark ride for instance.
The UK is too small a market, and the parks too small themselves to warrant any of the other compeititors to come in and beef it up.
We're pretty lucky in what we've got in my own opinion, with only Universal and Disney being the other worldwide brands/owners who are doing things better than how we're doing.