IDG News Service - Buyers looking for a tablet with Intel's new Bay Trail Atom chip and a 64-bit version of Windows 8.1 will have to wait until early next year.

Intel executives on Wednesday said the first Bay Trail tablets will use only the 32-bit version of Windows 8.1, despite 64-bit support on the chip.
Tablets with the 32-bit OS have a 4GB ceiling for DRAM memory, while 64-bit can actually support 512GB. Most early Bay Trail tablets with Windows 8.1 will not have more than 4GB of memory, said Steve Smith, vice president and director of tablet development at Intel.
"We have the capability, now it's a matter of when a consumer system would need that, that's probably sometime in the future, I'd say a few generations away," Smith said.
Windows 8.1 tablets with 64-bit Atom chips not coming until Q1 - Computerworld