Now it's true, it's the end of CS 1.6 in big events. If you want to continue playing only casually, you can, but if you don't migrate to CSGO you will not be missed, CSGO will be released for consoles, and will broke the sell records of Valve, the console market it's 10 times bigger than the PC. Valve don't give a shit about your opinion of CSGO, they only want all the money like all capitalist enterprise.
They only reason why CS:GO will be released already on 21 August is the fact that a new COD will come on November and CS:GO can't compete with COD on consoles. That's also the reason why they decided to bring CS:GO on PC: CS:GO was originally planed as a simple XBOX version of CS. But after some time of developing they realized they can't compete with COD and BF. But since there are still a lot of CS fans in the PC market they just said: Okay, let's bring this shit on the PC too.