I would like to see TestComplete releases in 64 bit mode. Since more and more applications are becoming 64bit and (Virtual, Cloud) Operating Systems as well. Also OS'es are moving toward 64-bit. And ...
Every TestComplete installation "lives" in a different architecture, with different (typical) setups, tuning issues, etc.
Common practise what I know of is that some software vendors ship their products in both versions: 32bit and 64bit.
Then the client can choose which one to install/evaluate, which is best!