Alternatives? What alternatives?
The high end Atmel and the PA Semi use ARM licensed core.
Microchip use MIPS core for 32F series.
Qualcomm, PA, Samsung, Analog Devices, Freescale (Ex Motorola), Intel(they didn't sell all ARM to Marvell), Marvell, Nat. Semi. NXP (ex philips) Atmel, Renesas (formerly Hitachi and Mitsubishi), Sony, Broadcomm, Infineon, Toshiba, Texas, NEC, Fujitsu, Zilog and many others licence ARM cores or IP.
ARMs account for over 75% of all 32-bit embedded CPUs. The new Cortex M series (priced down to $1 go after Microchip/AVR/Atmel/8051 8bit and 16bit embedded CPU markets. The Cortex A series chase the Atom MID/Netbook market.
Also other ARMs displacing MIPS, ST20 etc. and x86/Geodes from Routers and Setboxes.
ARM powers more than Smart phones. At least 80% of phones use ARM
This would be like MS buying Via, AMD and Intel to prevent production of Apple Mac and Linux PCs.