@erhk: Altera's Programmable SoCs and Xilinx Zynq SoCs are indeed similar -- both boast an ARM Cortex-A( dual core hard core microcontroller. Both hav eon-chip memory and peripherals and programmable digital fabric. In both cases the ARM core can communicate to the programmable fabric via AXI busses.
There are some differences, not the least that the programmable fabric is different -- and the DSP slices -- and stuff like that -- I'm not saying one is bbetter than the other -- just that there are differences. Also the Zynq has some programmable analog and 17 analog input pins and stuff