Earlier reports have talked about a Surface tablet running on a power-optimized Haswell chip to be announced on 20th May. So, it is still not sure whether this Haswell Chip based Tab is one and the same as the 12-inch Tab rumored now. Though, as per the report the Tablet may see a “limited US launch ” on 20th May. As per some other rumors it can be labelled as Surface Pro 3.