Since the 800x600 resolution got extincted for many years 1024*768 could be expected as minimum available resolution. A resolution of 720 pixel in height is still very uncommon for PC gamers. To verify this just take a look at the Steam hardware survey of may 2012. The following list shows all resolutions that have more than 1% share of the user base and at least 768 pixel in height.

• 1980 x 1080   25.15%
• 1366 x 768     17.11%
• 1280 x 1024   10.78%
• 1680 x 1050   10.25%
• 1440 x 900       7.58%
• 1600 x 900       6.77%
• 1024 x 768       5.51%
• 1280 x 800       4.23%
• 1920 x 1200     3.64%
• 1360 x 768       2.37%

These resolutions sums up to 93,39%. Compared to these here is the same list for 720 pixel:

• 1280 x 720       1.51%

And even this resolution had a growth of 0.63 % since the last survey and therefore would be below 1% some time ago. Even the sum of all users with a resolution below 786 (there are some more with little percent values) will be 2% at maximum. In addition steam users are not high end users but reflect quite good what users have at home.

So supporting 720p was (is) for PC game developers a goody but nothing relevant. This might change if more users will use 720p TV screens but when Demigod was released in 2009 nobody cared about 720p for PC gamers.