I hadn't seen that. Now I've visited the official page (
http://www.razerzone.com/gaming-systems/razer-blade#powerful) and it says that the 14" Razor Blade is going to come with a 2.2 GHz quad-core 4th gen Core i7. According to some websites, it is a 37W chip, which is still to be announced (I've not found this 37W quad-core processor in any website listing Haswell parts). I was under the impression that Core i7-4800MQ, Core i7-4900MQ and Core i7-4930MX were the only quad-core models to be released in June. But it appears I was wrong.
This is an unspecified model, and it might be inside the 13" rMBP, that would be just great.
I am concerned, however, on a few points: (i) the Razer Blade gets a 6-hour battery life, despite having a lower-resolution screen (1600x900) than the 13" rMBP; and (ii) the Razer Blade is a very expensive machine (US$ 1,799 with 128 GB SSD).
I suspect that these two issues are partially due to the quad-core processor, and it may prevent Apple from using it on the 13" rMBP. But the dedicated video card may also be responsible for the high price and low battery of the Razer Blade...