It may be only a matter of time before we see the 2.0T in the Veloster or its successor. By a matter of time I'm guessing 2016-17 and the Elantra and Veloster get bigger.
It looks like the 2014 VT will have the same 1.6T 201hp motor because Hyundai is putting it an Elantra and a Kia Forte unchanged in 2014. There might be a VT-R for 2015 that gets 220+hp. But any more power than that will need the stouter transmission and drive-shafts of the larger drive-train.
I dunno though. Hyundai has purposely placed the VT in a specific gap in the market. If the VT gets more expensive than it has to run up against the GTI, the Focus ST and the Genesis Coupe. Hyundai took over the sedan market by offering equal or slightly better cars at lower prices. Hyundai will probably stick to this plan with the Veloster and Veloster Turbo.
I remember when the GTI came out. It only had 110hp, but it came with nice rims, brakes, suspension and styling. And it was cheap - half the price of a BMW 320i or Nissan 280ZX. Everyone said that the GTI had to have more power, but VW stuck to the affordable formula. GTI's sold more Rabbits/Golfs and Jettas and established VW as a serious manufacturer. Honda joined the fray with the Civic DX Si and CRX Si. They weren't much more powerful, but they were really nice cars and also quite cheap. Now those 2 cars are icons. Honda followed with Acura Integras that were more powerful and more expensive - but they never became icons.
If I was Hyundai, I would ride the sales popularity of the Veloster for one more year and raise prices a little. Once I had the 1.6T VT drivetrain in mass production I would put it in everything and gut the price. I would use the VT drivetrain to to stomp and Honda, Toyota and Ford.