I have read on forums about it but that gives me only the main idea - I can't find details of it's appearance. I have been waiting for official deep anolysis of TESOs combat differences and similarities to combat of other TES games.
Since GW2 is doing a beta weekend in 9 days you could try that. From what I've read and heard yet their combat system sounds similar to TES:O's as far as the synergy stuff goes. You could also take a look at Diablo 3, which is similar as far as the limited ability set goes.
Trying those two should give you an idea on the difference between TES:O and "classic" TES combat.
Or just wait until the TES:O betas start.