It's not like Apple never drew inspiration from the competition before. The whole "Macbook Air! It fits in a manila envelope!" comes right out of Sony's catalog. In fact, it seems Steve really had some kind hard-on for Sony, considering quite a few bits of Macs are actually stuff Sony came up with.
I don't doubt that Jobs and Apple have drawn inspiration from Sony. But honestly I've never looked at a MacBook Air and thought 'wow that looks just like a Sony Vaio or whatever. Just like I'd never mistake an Asus Zen Prime for an Air.
----------
I think the idea that Apple was once innovate and aren't anymore is silly, especially if it's because they imitated the competition and made smaller tablets and larger phones.
Being bull-headed is NOT innovative. Refusing to adapt is not innovative, and Steve Jobs was not a bull-headed person. There were a number of times that he made a statement and then completely contradicted it a few years later. After all, he was a really good salesperson and he wanted to show that what he was selling was THE BEST, and anything else was irrelevant.
And if people say making a device thinner and lighter is not innovative than surely making a smartphone with a larger screen or a tablet with a smaller screen isn't either. Couldn't one argue that the larger screen phones were due to battery requirements to support LTE? And smaller screen tablets due to Amazon and others knowing their best chance of competing with iPad was on price? Of course that's morphed into people liking those form factors but it doesn't necessarily mean it was "innovative" any more than shoving all this amazing tech into thinner and lighter designs is.