This is a logical move and this announcement has been expected since the launch of the i-X0 family.
When the gamma, 1.6 l, 93 kW engine was launched in 1998 it was already said that the engine had a lot of margin for improvement of performance. Obviously the small kappa 1.2 engine is able to perform quite well with high ratio of power per displacement.
This is in fact the policy that has been applied by the group Volkswagen with the family of TSI engines. Unfortunately Volkswagen never introduced CVVT (Continuous Variable Valve Timing) technology in the valve train.
Hyundai atmospheric aspirated engines did already very well without GDI technology, for example a Gamma 93 kW is equivalent for maximal power and for fuel economy to a 1.4 TSI from VW.
I suppose that Hyundai will keep the CVVT on the turbo GDI and this should give an engine able to deliver almost peak torque from 1500 rpm to 6000 rpm as well as a fuel economy much better than what is achieved with the VW TSI solution.