'True' Thunderbolt to DisplayPort or DVI cable?
I took a look at Belkin's website on this particular product and they clearly state that it "Supports dual displays &amp; 4K cinema resolution."



Now, there is no "Thunderbolt" to DVI/HDMI because Thunderbolt is an extension of PCIe.  So, in a very basic sense, this would be like trying to plug your monitor in directly to the logic board and not go through the video adapter; it cannot happen.

However, Thunderbolt "multiplexes" the DisplayPort signal on that single cable.  You are going to get both.  Now, if you use a a Thunderbolt compatible cable, you can daisy chain additional TB devices off your monitor, albeit at a reduced data transfer rate.  This is why monitors are the last in the chain.  If you use a non-TB cable, you will only get display and no TB signal.

EDIT:

It was really bugging me that this didn't work because I was close to reccomending this product for a friend and I wanted to do my due diligence.  I found this on their support site:



So, basically, in order for you to get dual displays, you need a native Thunderbolt Display like these.

If you do go that route, remember you will need a Thunderbolt/Thunderbolt 2 cable