First cheats are circulating for the PC version of Overwatch .
The Aimbot from Soldier:76 and the “Wallhack” from Widowmaker are legal and are intended in the game by Blizzard as limited-time Ultimates. Both abilities are based on long-known and established cheats for shooters. The “illegal variants” seem to have made their way into the game as well.
According to the Asia-focused site 2p, an Aimbot is being offered for $30 on the largest Chinese shopping site (Taobao, something like a Chinese ebay), which has already had around 100 sales.

According to sources, the bot operates on a “subscription model.” The bot advertises with Wallhack, “Instant Auto-Reload,” recoil reduction, and auto-aiming. You can even stream with the bot; viewers do not notice it.
As noted by PcgamesN, this is likely not a problem unique to China. Comparable bots are offered for sale/subscription in “notorious forums.”
Blizzard’s Overwatch seems to be quite unsuitable for tools whose use ends in bans, due to its high entry price. An in-game report system and other means to report cheaters are already implemented. Blizzard has also stated, that there will be no mercy towards cheaters: Once someone is caught, a permanent ban will follow.
But despite everything, it seems that a “cheater” problem is also looming for this shooter.