By Eva Dou

TAIPEI---Acer Inc.'s (2353.TW) chairman said Monday that Microsoft Corp.'s (MSFT) low-power operating system Windows RT won't be "so influential anymore," and the firm has not yet decided if it will launch an RT tablet.

It will be difficult for Windows RT, Microsoft's version of Windows 8 based on ARM Holdings PLC's chips, to overcome the lack of compatibility that the full Windows 8 version has, J.T. Wang said an interview with The Wall Street Journal ahead of Computex, Asia's biggest computer trade show that kicks off Tuesday.

"We would like to be realistic. We have not decided if we want to launch that, to start mass production," Mr. Wang said.

Well known for its low-cost notebook PCs, Acer has struggled more than its peers in the PC market as the tide turned toward mobile devices. It has seen its market share erode globally, although Microsoft's recent support for its partners in marketing and high-end product development for Windows-based products has helped Acer offer more affordable devices.

Acer's PC shipments will continue to decline this year from last year, although Mr. Wang said he expects to do better than the 7.8% decline that IDC forecasts for the global industry. With tablet shipment tripling, the world's fourth-largest PC maker by shipments hopes to keep revenue at least flat with last year, or marginally higher, he said.

Around 55 percent of the year's revenue will come in the second half, he said.

Mr. Wang is hopeful about the growing demand for touchscreen devices. He said 30%-35% of Acer's laptops will have touchscreens by the fourth quarter. Within three years, he expects virtually all computers to have touch functions.

Earlier Tuesday, Acer launched a 5.7-inch "phablet," or a tablet that can make phone calls, throwing in its contender for a product category popularized by Samsung Electronics Co. Other new Acer products include touchscreen laptops.

Acer's priority is to "focus on profitability" and it is not interested in acquisitions for the moment, Mr. Wang said.

Write to Eva Dou at Eva.dou@wsj.com

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