Nope, the Radeon 9800 was king of the hill for quite awhile (mainly because the Geforce 5 was crap)

Numerically, it MUST BE 800 SPUs, because each shader shader unit is capable of 2 FLOPS, and if there are 800 units, this means that Radeon HD 4850 with its 625MHz will hit exactly 1TFLOPS. That is AMD/ATI chose that specific frequency. Radeon HD 4870 with its 750MHz core will have 20% more processing power available and hits 1.2TFLOPS.

It is officially confirmed that both cards will have 1TFLOPs (unleashonetera.com).

It seems that GPU-Z 0.2.4 shows 800 shaders.. does not really correlate with a TDP of 110W but time will tell..

Also note your calculation of 160 shader * 625MHz = 1TFlop is really cool  but suffers from a small detail: The shader clock is _unlocked_ in the 4850 series and does not operate at 625MHz, the GPU frequency. (The actual marketing calculation goes probably more in the line of 480 SP * 2 Ops * 850MHz = 0.8TFlop + TMU ops + GPU ops + Whatever ops >= 1 TFlop.

More than 100W TDP is too much for my tastes, but it's good news anyway for me, I can buy now a MoBo with 780G, the fastest ever integrated graphics chipset so far, it will be good enough for a lot of less power hungry games, particularly for those I'm playing now and those I'm going to play, and in a 1 and 1/2 year very fast low TDP cards should be available.