I think the data they collect here is still very useful to studios, producers, etc. Also, not everyone will be spending REAL money to take a shot at box office revenues. The economy is such that I think only those with some disposable income will be investing for real...it's still like the stock market - you win some, and may lose some.
I think also there are FAR more numbers of accounts and players here than there will be with the real exchange...sure, that could change over time, but I still think there's room for both exchanges, and I still think that HSX will serve it's purpose by gathering data which they can sell to various groups... that's something that I don't think the real exchange will offer in the same degree of numbers.
Only time will tell, but for now...I think there's room for both.. but that's just MY opinion.