Re: 896 megs, 1 Gigabyte, 2 gigabyte? Something some might find interesting.
I'd say the market is reasonable, but mostly limited to true enthusiast at present. Most others tend to do the big LCD/Plasma television as a monitor thing at the moment, which is really giving 1920x1080 a shot in the arm. The expense of a 30" monitor is also keeping interest down at present.
Plenty of framebuffer is definitely important to me though, as I said above and I hope 2gb cards are a solid option for the next-gen GPU's coming out (with 1gb cards also for those who don't see the point). With resolutions and texture size/quality on the rise, plus AA, plus potentially PhysX and maybe even CUDA/DX Compute all demanding their share in future games I can't see myself purchasing a new card with less than 2gb on it.
CPU: Intel i7 2600K
Cooler: Cooler MAster Hyper 212+
Motherboard Asrock z68 Extreme 4
Memory: 8gb Corsair DDR-3 1333
Video: 2x Galaxy GTX 670 reference 2gb
PhysX: Gainward GTX 460 SE 1gb
Video Capture: Compro E-700 DVB-T PCI-e
PSU: Thermaltake Toughpower 1200W
Monitor: Samsung 305T 30"
Case: Coolermaster stacker 830
Hard drives: 5x 500gb seagate SATA (non raid)
Burner: Samsung SH-S18L
OS: Vista Ultimate 64 bit and Windows 7 Ultimate 64 bit
MS Sidewinder Joystick
Logitech G25 wheel
Logitech 5.1 speaker system