The Acer Aspire Ethos 8951G is a big laptop with sleek looks and a terrible touchpad.
It appears Asus will hit the consumer sweet spot of a price under $1000 for an Ultrabook, at least on some models.
Tablets and smartphones launching at the electronics show opening this week are expected to push screen size boundaries and run OS updates from Microsoft and Google.
Laptop makers Acer and Asus are racing to bring competing ultraportable laptops to market in September.
Acer on Friday started shipping a US$329 Iconia Tab A100 tablet, which the company says is the first tablet with a 7-inch screen to run Android 3.2.
Acer and HP are set to swell the ranks of 7-inch tablets with new offerings. Compact versions may be the next tablet battleground.
HP makes third price cut in one week for its TouchPad tablet.
Rival manufacturers to Apple's iPad tablet could increase their market share by dropping prices, but they will need to fight hard.