Updated from June 10 with new information.
The tech giant is expected to unveil a more capable digital assistant during its Worldwide Developers Conference (WWDC) that begins with a keynote address from Tim Cook at 1 p.m. ET, as well as Siri's potential inclusion in the company's Mac ecosystem (TheStreet will be covering the event with a live blog, so please check back here for updates).
The expected moves would put Apple more in line with other tech companies that are thinking about adding artificial intelligence to smartphones, tablets, computers and dedicated devices such as Amazon's (AMZN - Get Report) Echo and Alphabet's (GOOG - Get Report) pending Home.
Although Siri practically invented the digital personal assistant in 2011, Amazon and Google have recently upstaged it by introducing their own dedicated devices, as well as by expanding those devices' functionality with the help of third-party app developers. Much like with smartphone apps, the tiny programs (Amazon refers to them as "skills") help digital assistants perform tasks such as controlling smart homes, booking plane tickets and ordering food.
So far, Apple has resisted releasing the code necessary for outside developers to write apps for Siri, but that's expected to finally change on Monday.
"They're going to finally open Siri to third-party apps, which is something they should have been doing a lot earlier,"said Tim Bajarin, an analyst with Creative Strategies, in a phone interview. "I also wouldn't be surprised if it's integrated into OS X."
Bajarin said he's hoping the company will also discuss how three recent artificial intelligence (AI) acquisitions will fit with Siri. In October, Apple bought VocalIQ, a U.K. startup that helps computers speak more clearly and better understand human speech, as well as Perceptio, which uses AI to allow computers to identify pictures. And in January it picked up San Diego startup Emotient, which helps computers detect human emotion from images.
Bajarin said he's also looking for Apple to give developers some insight into new computer chips that might power a new iPhone and Macs, both of which he expects to see released later this year, along with a new Apple Watch.
As to whether Apple might unveil its own dedicated personal assistant device this year, Bajarin said "it would make more sense for them to bulk up the devices they have," such as the iPhone and iPad.
In addition to a more mature Siri, the company is expected to highlight changes to Apple Music to hasten its transformation it from a seller of music downloads to a streaming service.
Apple is also expected to announce some changes to its Apple Pay digital payments system, including the possibility that it would be available for online retailers to use, instead of just physical stores and app sellers.
As at past WWDCs, Apple will also likely offer details on upgrades to the operating systems that power its phones (iOS), computers (OS X) and its watch (watchOS).
"We tend to think that those are not very important but... they are the foundation for everything," said Horace Dediu, a former Nokia analyst and tech industry expert, in a phone interview. "There might be a Mac product [announcement] but not a primary product like a [new] Mac or watch."
The Mac product announcement is likely to consist of upgrades to the company's Macbook Pro laptop such as a thinner and lighter case, according to RBC Capital Markets analyst Amit Daryanani.
Still, Apple pundit Dediu said he's puzzled by Apple's decision to hold the keynote at the Bill Graham Center rather than the usual Moscone Center convention venue. Past WWDCs have been held exclusively at Moscone and the remaining events of this year's event will be held there as well.
"I'm waiting for something much bigger and that's the car," Dediu said of Apple's long-rumored entry into vehicles, which it supposedly is developing in Berlin. "I don't think we'll see that."
But Dediu says the Civic Center was likely chosen because "they really felt the logistics were inadequate for some reason that we don't know about."