Depends where you shop.
It is in the best interest of big box retailers to carry the latest licences, for MANY reasons. SALES also draw customers, those who have been holding off on 7 will now invest. The software licences seem about the same, the hardware they come preinstalled on gets pretty cheap though.
A shop that doesn't carry mainly new products and software does not look like they are on top of technology. Stock movement is also critical, whereas in a boutique style shop, it is less important as the solution provided.
As for Premium price, the higher end machines are still the higher end/premium machines, around here they still mainly boast Win7, but you'd never see anything more than halfway decent in a big box retailer, FutureShop/Best Buy etc..
