WHAT YOU SHOULD DEFINITELY DO:
1) Buy this on Steam
2) Go to http://openxcom.org/about
3) Install OpenXcom! (and maybe some community mods for fresh gameplay)
4) Enjoy OLD XCOM OPTIMIZED for both new and old generation of players

WHAT WILL THAT GIVE YOU:

• Resolution settings - Beautiful 1080p with great GUI scale options (I recommend Geo:1/3 display and Battle:1/2 display)
  
• Easy and smart Save&Load system - F5 & F9 for quick saves, auto-saving, unlimited save slots, detailed savefile descriptions
  
• Shortcuts - Tab & L.Shift for switching between soldiers, RMB on button to move all items and more in Options>Controls
  
• No Copyright Problem - Contains no copyrighted assets (requires Steam copy installed - hence Step 1)
  
• Two separate launchers - You'll have one for Steam's emulated X-Com and one for polished OpenXcom
  
• No need for emulator - OpenXcom is clone of the original - entirely recreated in C++ / SDL, no need of DOSBox
  
• Open Source - perhaps make a mod yourself
  
• Runs on most platforms - Win, Linux, Mac, Android you name it. You can even make it a portable version
  
• Mods - A total must have mod is Extra Ufo interior variants (link in comments) it absolutely refreshed my love for the gameplay
  
• All bugs and glitches fixed - that "Battleship corner-Flying suit" trick grandpa taught me will no longer fly
  
• Single Battle generator - Cool mission creator in the main menu (under "New Battle") Great for quick challenges and experiments
  
• Many configuration options - So.. many.. options.. Options>Advanced lets you switch even stuff like Sneaky AI, explosion height or realistic globe lighting - the settings menu is simply top tier

PERSONALLY FAVORITE FEATURES:

• Renaming of stuff - I will no longer lose sleep over a typo in Bese num.6's name, plus you can rename even aircraft!
  
• Weapons control in UFO interception - Turn off/on aircraft's weapon during UFO interception, no longer wasting my precious Fusion Balls
  
• Aircraft inventory and crew management in hangar - Equip Craft>Craft>Equipment>Inventory lets you prepare soldiers' equip beforehand
  
• Button to enter the base from geoscape - my Win99-DOS version didn't have this
  
• Radar range indicators on Geoscape - my Win99-DOS version also didn't have this
  
• Language support - I had to put on the original 1995 Czech translation for the ultimate nostalgia
  
• Great Community - lively Discord servers and annual charity streams (All the <3 to SupSuper)
  
• OpenXcom Wiki as part of UFOpaedia.org - you can find neat info like Hidden Features there

FEEDBACK:
My best friend got into XCOM with my XCOM 2012 recommendation. When I showed him the glory of old X-Com through OpenXcom, he fell in love and admitted that if it wasn't this polished that he probably wouldn't be able to get into it. OpenXcom can make new X-Com fans!

Pictures for my presentation! Check them out[imgur.com]