Well, I suppose a 911 Turbo wouldn't be a 911 Turbo anymore without the turbos, right?
And we should wait how good or bad the VTG technology works since nobody has experience with it yet.
In my "fantasy", the VTG technology is actually perfect for sportscar since it should be possible to adjust precisely torque/power levels at certain rev figures. I don't know if this is true but theoretically, it should be possible. You hardly can do that with a normally aspirated engine without giving away torque/power at certain rev ranges.