- Unity 5 will introduce physically based rendering, web builds playable in html5 or flash, some audio features, etc. No new UI features.
- Unity 5 comes out next summer.
Customer support's face when they read your email...
the beta is already out and the devs should have it, since they are Unity Pro subscribers. aren't you, what's the word, dense?
And it will feature a better code, a better workflow and a faster set of instructions. therefore, making those kind of adjustment would be easier.
Not to mention, faster rendering helps always.