13-15 inch surface with Haswell processor (with new integrated graphics), and other upgrades, and I'm set.
Surface Pro: 6+ hour battery life under normal usage, not "if you turn brightness to 5% and run one web page"-level battery life. (Right now I get around 3.5-4 hours).
That's the only must have for me. NFC and at least two position kickstand would be nice. Otherwise I think the hardware is pretty great and I love the form factor, we just need some big software upgrades.
I never understood the "I want it lighter, less weight, its too heavy" crowd. Its currently two pounds. Jesus, how weak are you people.