It's funny all this complaining I've done about the price of the 32GB option (with LTE). I finally decided even at $400 that's an acceptable price. So I go to look at the price of the 32GB Galaxy Tab Pro 8.4 and Tab S 8.4 and just realized there isn't even a 32GB option available for them (not that I found on Amazon at least). *slaps forehead*
So as I was saying in my head I'm comparing the pros and cons of the Shield Tablet with what I consider it's main 8-ish inch competitors. The Tab Pro 8.4, Tab S 8.4, and iPad Mini 2.
Obviously one benefit I just now see is with Shield Tablet at least I do have the option of getting a 32GB model, that can't be done at the moment with either Galaxy tablet. The iPad Mini 2 has 32GB, but that'll cost $500 and with LTE that is $630. The iPad Mini 2 doesn't have micro SD like the Shield Tablet and Galaxy Tabs, but if money is no object you can get a 128GB iPad Mini 2 for $700.
Performance. Going off of the Mi Pad reviews, which has a K1 inside. The GPU performance just blows everything away. And even on the CPU side the K1, which is still using the ARM 15 cores, still seems to have a leg up on the competition in most of the benchmarks. So the Shield seems to have the best performing SoC of the bunch.
Display. It's only a 1920x1200 display. That still has plenty of DPI that I think everything should still look sharp. And I admit I haven't seen the 2560x1600 displays on the Tab Pro or S. But both seem to be highly praised for their beauty and the AMOLED on the Tab S is probably nothing short of amazing see. The iPad Mini also has a higher DPI display, but not by as much. My guess is the Shield might be at the bottom of the competition here. However the resolution was likely for a reason, it's intended for gaming and you'll get more FPS out of this resolution. Games will run smoother. (edit, just adding in I realize there is more to displays the resolution, but I believe all these tablets should have nicely calibrated colors, good contrast, and so forth. However the Tegra Note 7 did have some display quality complaints, so but I'm thinking the more expensive Shield Tablet will have addressed that).
Extras. Samsung puts all kinds of extra features into their tablets, many of them are software related like multi windows, and such. Almost all the Touchwiz features are things I would prefer not to have. The Galaxy Tabs also have an IR blaster, but that's another feature I don't use. The iPad Mini 2 really has no extra hardware features, though it's app eco system could be considered a special feature in it's favor. The Shield comes with a stylus, which is something I would use, I also like the inclusion of an HDMI port on the tablet. And for me the fact that Nvidia is using a stock Android OS and says they'll update it quickly to Android L is a impressive feature in itself.
I was tempted to by the Galaxy Tab S 8.4. I'd love to have an AMOLED display on my tablet, that is a big selling feature for that tablet to me. Unfortunately I held back because of the Exynos 5 processor is not impressive with graphics.
Now if I was buying an 8 inch tablet, it would very likely be the Shield Tablet. Though one reservation I have is it's size and weight. It's about 25% heavier than a Tab S 8.4, also taller, wider, and thicker while having a smaller 8.0 inch display.
Also another thing that may hold me back is the Nexus 8/9. I suspect this is a tablet I'd probably rather have, but it could still be months away.