Well, if it wasn't announced before, it is now. From Anandtech:
Argh, mention the name Macintosh and my ears start to bleed
Well, as with the GeForce3 last year, it looks as though Apple has first dibs on new NVIDIA graphics cards:
``The new dual 1-GHz Power Mac G4 with NVIDIA GeForce4 graphics is the fastest Mac ever and the fastest personal computer ever for creative professionals,'' said Philip Schiller, senior vice president of Worldwide Product Marketing. ``This is the first Mac to break the 1-GHz barrier and the first computer in the world to feature NVIDIA GeForce4 graphics.''
Apple also introduced two new Power Mac G4 models with 933 MHz and 800 MHz PowerPC G4 processors, starting at just $1,599(US). All models feature the Velocity Engine(TM), and the 933 MHz and dual 1-GHz models include 2MB of double data rate (DDR) L3 cache per processor to boost performance even further. All models also include next generation graphics technologies from NVIDIA and ATI. The 800 MHz Power Mac G4 includes the ATI Radeon 7500 with 32MB of DDR SDRAM. The 933 MHz and dual 1-GHz models debut the incredible NVIDIA GeForce4 MX with 64MB of DDR SDRAM, able to generate an astounding 1.1 billion textured pixels per second. In addition, all Power Mac G4 models now offer dual monitor support.