Originally Posted by Failbhe
Yes, that's what they become. But IMO, it's not a 'breed' now. In a generation or two when you can show me consistent offspring with the desired traits you've been breeding for, sure, then we can start calling it a breed. Creating new breeds of horses (or dogs for that matter) used to be a long process (painstaking and well thought out for some, accidental for others) but nowadays everyone wants instant gratification. "Look, I crossed two things - it's a new breed!!!" No, it's a cross. Perhaps a nice cross, but it's a cross.
Well, I'll pick on the Dutch Warmblood since it has things in common and is not very old. It's studbook started in 1958, 26 years before the Georgian Grand registry, so is the Dutch Warmblood just now meeting the requirement of being called a breed (depending on how many years you call a generation)? Actually, the Dutch Warmblood was considered a "breed" by the time it was as old as the Georgian Grande. Not as recognised as it is today and not as successful, but still an accepted "breed".
What matters is does the "breed" survive. E.g. You can't find the "American Horse" today. You can find many breeds that it contributed to the creation of and they ultimately replaced it.