That might be entirely unenforceable in the U.S. as well, but I doubt most companies are clamoring to go up against Apple's lawyers to prove it, and those that

That might be entirely unenforceable in the U.S. as well, but I doubt most companies are clamoring to go up against Apple's lawyers to prove it, and those that might (Amazon, Google, Microsoft) so they could include it in their offerings might have to worry about Apple throwing even more resources at the case to make it extremely unprofitable to do so, and also that Apple might specifically do stuff to make it harder afterwards for that company. That applies equally as well to companies in the EU. I'm not sure if it's accurate, but I and many others see Apple as a fairly vindictive company, from stories about how Jobs operated to how they treat developers that speak out. My impression is that it's part of their DNA now.