There is a game poster of PES 2010 for iPad at GamesCom, but it is just a joke. In fact, the
PES 2011 will come to
iPhone and other smartphones. KONAMI didn't announced about iPad version.

KONAMI said
PES 2011 is set to improve on
PES 2010. Most obviously, it adds Bluetooth and local Wi-Fi multiplayer, The online Wi-Fi multiplayer is being tested. The other change is PES 2011's social functions, the implementation of social features through a platform like Scoreloop, OpenFeint, or Apple Game Center. And "PES 2011" will have the Champions League and Europa League mode.
Konami has announced PES 2011 will be on iPhone, Android, bada and other smartphones, but there is not a Windows Phone 7 version. PES 2011 will be launched in early October. By the way,
How To Install USB Driver For Android Devices will sure help you.
Related article: Pocket Gamer: Top 10 Best iPhone Games of 2010 (Part I)