Hewlett-Packard is one of the first to offer 64-bit compatibility on Windows 8.1 with a tablet using Intel's latest mobile processor. But others will follow.
The ElitePad sports a quad-core Bay Trail processor, Qualcomm Gobi 4G LTE, 64GB or 128GB of storage, and a 10.1-inch 1,900x1,200-megapixel display.
And Dell will roll out updated Venue tablets with 64-bit mode turned on, Dell told CNET earlier this month.
To date, Windows tablets based on Intel's newest -- and redesigned -- quad-core 64-bit Atom processor from HP, Dell, Lenovo, Toshiba, Acer and others have run in 32-bit mode.
One of the most oft-cited reasons for going 64-bit is to address more memory, beyond the 4GB limit that's typical for 32-bit applications. But there are other reasons too.
"The pressure for 64 bit is pretty strong because IT organizations want to standardize on 64-bit images and 64-bit apps," Nathan Brookwood, principal analyst at Insight 64, said in an interview earlier this month.
There are a handful of Intel Haswell-based laptop-tablet hybrids, such as the Surface Pro 2 and certain Dell Venue 11 Pro models. Those devices already run in 64-bit mode but they are designed to be more laptop than tablet and typically are heavy and thick, pushing the boundaries of what is considered a tablet design.