Enterbrain has posted a product page online for RPG Maker VX Ace. It can be found over at Tkool Web. I've also taken the liberty of translating this page. You can find it locally at the Enterbrain Site Translation.
Some key points...
- The ability to use a different tile set for every map.
- "Various improvements to 'Ruby' have now led 'RGSS' (Ruby Game Scripting System) to reach version 3. 'RGSS3' holds new improvments such as quicker processing speed." -> Further hinting at RGSS3 carrying Ruby 1.9.
- Built in "caterpillar" like functionality, and the ability to have a maximum party size of 8 (though it seems 4 are counted as "reserves").
- Battle background are... back! It also appears that you can combine different parts from them to make new ones.
- Character Generator. Think of this like the old Charas.EX project, or the web based one from Enterbrain but better. It will give you options to create original faces / walking graphics for your characters.
- Ogg Theora video is now supported and can be displayed through an event call.
- TP / Finisher System. Similar to a limit break bar from FFVII.
Also, I'd like to point out that Yanfly did a bit of investigation into the resolution that RPG Maker VX Ace games will use by default. It seems like 544x416 (same as RPGVX) will be it. You can find more at Yanfly's blog. The explanation from there is below.
"The screen is 17 tiles wide by 13 tiles high. Provided that the tiles are going to be 32 x 32 pixels again, this means it uses the same resolution as VX (544 x 416). Hopefully, there still exists some higher resolution options, but the chances seem unlikely at this point."
