HRTV and TVG
 

Since these two channels have common tracks shown on both networks, wouldnt it make sense if these two merge into one channel?

There is still a number of differences between the tracks they offer.

Fair Grounds and Gulfstream are exclusive to HRTV.

Yes SoCal racing now on both.

Can't wait for one of these channels to go HD. Preferably HRTV.

Horse Racing is the only sport to have 2 channels but the least viewers.
NFL, NBA, MLB, Golf are exclusive to their one and only network though they have their own flaws too.

For example: I live in Houston, I paid 179 dollars for NBA league pass on dish network and I can watch every single NBA game in the country EXCEPT for the Houston Rockets. Rockets signed a deal with Comcast so all their games are exclusive to them only.