Google is expected to introduce two new smartphones and other gadgets on Tuesday, as part of a product event in New York.
Google is also likely to roll out a new version of its "smart" Home speaker, a rumoured tablet with a detachable keyboard and an update to its Chromecast streaming device.
The latest Pixel phones are likely to attract the most attention, even though the first two generations have so far barely made a dent in the market.
Google has sold an estimated seven million Pixels, almost imperceptible next to the 388 million iPhones sold since the first Pixel came out in October 2016.
Google has been somewhat restrained in its distribution and marketing the Pixel phone, industry analyst Ramon Llamas said, because it doesn't want to alienate Samsung and hundreds of other device makers who feature Android in their own phones.
The iPhone also features Google's search engine, but Google may be paying Apple as much as $9 billion annually for that privilege, based on the estimates of Goldman Sachs analyst Rod Hall.
The new Pixel phones are expected to follow the trend of expanding the phone screen nearly to the edges of the device.
Analysts are also expecting Google to add higher resolution and more cameras to the Pixel, whose first two generations attracted rave reviews for its high-quality pictures.
