This Kali release is the first to include the Linux 4.15 kernel, which includes the x86 and x64 fixes for the much-hyped Spectre and Meltdown vulnerabilities. It also includes much better support for AMD GPUs and support for AMD Secure Encrypted Virtualization, which allows for encrypting virtual machine memory such that even the hypervisor can’t access it.

Easier Metasploit Script Access
If you spend any significant amount of time writing exploits, you are undoubtedly familiar with the various Metasploit scripts that are available, such as pattern_create, pattern_offset, nasm_shell, etc. You are likely also aware that all of these helpful scripts are tucked away under /usr/share/metasploit-framework/tools/exploit/, which makes them more than a little difficult to make use of. Fortunately, as of metasploit-framework_4.16.34-0kali2, you can now make use of all these scripts directly as have been included links to all of them in the PATH, each of them prepended with msf-.
root@kali:~# msf-
msf-egghunter msf-java_deserializer msf-nasm_shell
msf-exe2vba msf-jsobfu msf-pattern_create
msf-exe2vbs msf-makeiplist msf-pattern_offset
msf-find_badchars msf-md5_lookup msf-pdf2xdp
msf-halflm_second msf-metasm_shell msf-virustotal
msf-hmac_sha1_crack msf-msf_irb_shell

root@kali:~#
root@kali:~# msf-pattern_create -l 50 -s ABC,123
A1A2A3B1B2B3C1C2C3A1A2A3B1B2B3C1C2C3A1A2A3B1B2B3C1
root@kali:~#

Upgrade to Kali Linux 2018.2
If you already have a Kali installation you’re happy with, you can easily upgrade in place as follows.

root@kali:~# apt update && apt full-upgrade

More info.