Nvidia's current business can't be taken for granted, but I don't get the negativity about their efforts to expand into new markets.
"They only have a handful of car brands!" Well, yes, but AFAIK this is a market that's only starting to take off. I've seen the insides of a Tesla S and their display is nothing like I've seen in any car before (or since.) There are no guarantees that Nvidia will win in this market, but at least they are there at the start of it all. That's not a bad place to be. ($2B is not bad no matter how you spin it, though I can't find a link to that number?)
"Licensing is a sign of defeat." PR speak or not, when they state that there are vertical markets where they'll never be able to sell real silicon, they have a point. Why shouldn't they try to go after markets that Imagination Tech is currently dominating? Are they supposed to just sit and watch others light up the pixels they have the god given right to drive? It may never replace by their current business completely, of course, but neither does the $60M they get from Intel every quarter, yet it's a nice little extra cash to spend on R&D.
"Shield is a mistake, DOA, etc." According to their investors presentation, it cost $10M to develop (and counting, I assume.) Yeah, it's a gamble. But so what? They'll lose some face here or there if it fails. But probably also learned a great deal in the process.
I thought Grid was a dud (and I'm still unconvinced), but Sony is going to be spending a lot of money on PS3 game streaming to the PS4. If 5 years from now, we look back thinking 'how we didn't see it coming', Nvidia is in a good position now. And Grid for professional applications is something that has a real chance.
They are trying a lot of things. Even if some or most things don't work out, a single hit can do wonders. (Did anyone here believe that putting a discrete Nvidia GPU next to Intel iGPU would go anywhere? It won't make money forever, but it's probably a very large chunk of the notebook GPUs they are selling now.)