My DS must have library for the wargamer is
Advance Wars (both of them)
Allied Ace Pilots (not a bad flight game)
Age of Mythologies
Age of Empires (both much better with turns than their RTS originators)
B-17 Fortress of the Sky (if you like shooting things)
Civilization Revolutions (I think the DS release was the only one that did well)
Commander Europe at War (from here)
Front Mission (it's a game of mechs with turns)
Great Empires Rome (from here)
Heavy Armour Brigade (it's a tank sim)
Il2 Sturmovick Birds of Prey (flight sim)
Panzer Tactics (think Panzer Corps lite)
Steel Horizon (naval board game looking)
Stratego Next (nice version of the classic)
There are likely a few others, but that is my must have list for the military gamer. In addition to TAC Heroes
Now getting back to hand held devices in general.
If you don't plan to read a lot of 8.5x11 page sized books in full colour with illustrations, then getting a 10.1 tablet is in my view a bit silly. Because a 7 inch tablet is likely just as good for a bit of web browser action on the go, and you don't need 10.1 to read common paperback book sized pages. But I DO plan to use it to read a LOT of books mainly model references and history references from people like Squadron or Osprey that I have hundreds of pdfs for that have gone out of print. Because they are niche small print run publications.
People that claim they can do anything a tablet can do, but on their phone, are idiots trying to play up the worth of a smart phone for not so smart reasons. No I don't think smart phones are smart things to watch video on. They are stupid for playing games on beyond meaningless games. And they are sure stupid for reading books on. They're phones. And unless you have a decent phone package, you likely have no reason to have one at all too.
I don't want a tablet for games. But I will expect it to play them. And a 10.1 screen is plenty enough screen to make it worth it. It's a great deal better a screen than a DSi XL or a PSP. But I can understand those whining it won't fit in a pocket. I have NO plans to ever put anything worth 300+ bucks in my pocket though. It goes in the safety of my carry all or it stays in the house.
Desktops, ok I suppose. Mine is just a massive storage device. It holds over 5TB of video files. I don't use it for anything else. My laptop is more powerful, so it's the place I play games. If I want a big screen, I can plug it into my 40 inch Sony. The nice thing about the laptop, is I can pick it up and walk out the door too.
And I have learned during a few power outages, laptops don't care if the power goes out. The desktop dies, the laptop doesn't. I can get up and walk to the hospital and plug into their reliable power supply with the laptop being left on the whole time

It's handy eh.
The desktop has had it's day. It no longer has so much more power it is always the best machine in the house. It can't lay claim to the largest screen as that belongs to the TV and my laptop can use that on a whim. And I can use the internet and download to the laptop just as easy as large drives on them are now common place too. I have currently more than 300 gigs of free space on my laptop, and this thing is completely crammed with stuff as well.
I figure game design is at least a 2 year workload at the very least. Maybe I'm totally wrong.
I just know that in 2 years tablets will be a lot more common, Windows 8 will be old news and we will either be playing wargames on them, or wargame makers will have become that much more a thing of the past than they already are.
Sink or swim gentlemen. Be a part of the future, or a thing of the past.