Microsoft's ultramobile PCs product category are too expensive and their batteries don't last long enough, according to AMD.
AMD is exploring the prospects for ultramobile PCs such as Samsung's Q1, but won't commit until it's sure they make sense for users, said AMD's chief technology officer Phil Hester at Computex.
Ultramobile PCs are currently more expensive than many laptop PCs and their batteries don't last very long compared to other devices. They also need new screens that can be viewed outdoors under the glare of the sun, according to Hester.
"We have a processor for that space when the space is ready," he said.
Most of the big design wins for ultramobile PCs have gone to Intel and Via. Samsung recently announced a new version of the Q1, called the Q1 Ultra, which starts at about $800 and uses Intel's McCaslin processor.
The Intel chip should improve battery life considerably over the previous model, from 1.5 hours to more than four hours, according to Samsung.
But AMD has had some design wins too, with its Geode processors. Raon Digital, a South Korean company, uses the Geode LX800 in its Vega ultramobile PC, and has put an LX900 in its Everun, which hasn't been launched yet. The Vega boasts six-hours of battery life, while the Everun lasts seven hours on its standard battery, or up to 12 hours with an upgraded battery pack.
Besides ultramobiles, the Geode family is aimed at low-end laptop PCs and the high end of the handset market, Hester said.
There's a Geode processor in Nicholas Negroponte's One-Laptop-Per-Child laptop. The OLPC project is trying to reduce the cost of its laptop to $100 and put it in the hands of school children in the developing world.
Hester believes the battle to put the next billion people on the Internet is not going to be won by PCs, however.
"I really think for most people, the device is going to be the handset," he said.