Regardless, Nintendo is proof that "future-proofing" is irrelevant, the GB was a 2-color handheld that beat not only the Lynx, but Sega's Game Gear and Nomad. The Gameboy color outsold the Wonderswan, the NeoGeo Pocket Color and similar competitors that were better than it. The DS outsold the PSP. The Wii sold regardless of it having HD and an online network, and it did so for nearly five years. It's still the highest selling console this generation.
Apple doesn't cater to the Android market, the iPhone was and still remains obsolete in many ways, but that doesn't stop people from buying it.
Firmware is not going to improve how it handles. Firmware updates can only optimize already-existing performance, but they don't magically add more performance to hardware. There is a finite level to every piece of hardware, and if you push something beyond the processor's capabilities, it doesn't matter how many firmware updates you have, it's still not going to run properly. If you run Battlefield 3 on a GF 7900, with a dual-core AMD processor, it doesn't matter how many driver updates you can do, your PC still won't run it.
Upping the resolution doesn't benefit Nintendo, or gamers in the slightest. It'll look slightly crisp by comparison, but at that size, it's not relevant to what Nintendo wants out of it. Samsung's Galaxy S lineup had a lower resolution and larger screens than the iPhone 4's IPS display, and despite the lower resolution? The majority of reviews noted that the difference wasn't notable by the human eye.
So, really, bumping up the resolution is not important, the quality of the screen is, the resolution isn't. HD is relevant to screens greater than 10 inches or for tasks that require pin-point accuracy (which the Wii U will not need, unless you're running photoshop on it), and things that require minute levels of detail to be visible (like word processors on small screens, which the Wii U doesn't do). You're not word processing and you're not running photoshop on the thing, you're playing games, and as it is, 850x480 is good enough that neither the quality of the image will suffer, nor will games suffer from input lag due to the bandwidth allocated to the wireless tether between the controller and the console itself.
Up the resolution, and you'll only have a negligible bump in visual quality, you'd have to allocate MORE of your finite wireless bandwidth to the image stream, which would mean audio would suffer and input lag will be introduced. It isn't a trade-off that's worth it for Nintendo, for gamers and for developers.
The complaints about the 3DS are for the most part baseless, since the touch-screen support isn't really the point of the handheld, and as it is, it works fine for it.
The Wii U isn't a cutting edge system in the slightest, it's using technology that by the time it releases, will already have been used on computers 2 years older than it. And it isn't cutting corners, the resolution fits perfectly for what their goal is for the console. What phones and tablets do outside of the Wii U's ecosystem shouldn't be affect it. You're not taking your Wii U outside, it's always tethered to your console.
Nintendo doesn't care about "future-proofing." What it should be mindful of is the eco-system that affects its hardware, because that's what affected the Wii. HDTV use wasn't some distant problem that they could tackle later on, it was a present problem that they failed to acknowledge and they paid for it, much like their ignorance towards having an online system hurt them. HDTVs and online affected the Wii because the Wii both connected to a TV and supported online. HD on phones isn't something that is part of the Wii U's ecosystem, it isn't a feature on the Wii U, it isn't competition for the Wii U, they're different devices. A resolution bump on the screen would just tax the hardware, it would bring control lag, it would probably affect performance of dual-screen games.
HD would be necessary for general TV output, but for the controller itself, sub-HD works best. HD in phones and tablets benefit them because they're standalone devices, they wouldn't benefit the Wii U.
Dear Japan, Taiwain:
You've done worse. Get over it. Also, stop your BS misogyny.
Hell, of the 3 that have been delayed, only one was developed by Kojima's core team with Kojima's active involvement. Rising was being worked on by its B-team (and now Platinum) and MGS3 3DS I believe is also being ported by an outside company. So really, Kojimas track record for punctuality is better than most.