For starters, we can see the Try Me mode in action. It looks great, as buying a hero without ever getting to give it a go is not something you want to do, and waiting for your hero to appear in the free rotation could be really tiresome. Another interesting thing to note is the real-money cost of some items. While they say it may well change, there's a $7.49 or 5,500 gold price tag on Diablo, which seems alright for a hero, although more expensive than a lower-end League of Legends hero bought for RP. However, $14.99 seems a bit pricey for a Tassadar skin. There's also huge differences in the gold costs of the heroes, varying from 2,000 to 10,000 gold. Again, they do clarify that these prices may change.
We also see the talents tab, the leveling systems, and more explanation of the tints, quests, and much more! We can't wait for the Tech Alpha to get started.