The best replacement for kvm is xen.

The best alternatives to kvm are rated as following:
★★★★★  xen
★★★  virtualbox
★★★  vmware
★★★  qemu
★★★  openvz
★★  esxi
★  lxc
★  esx
★  vmware performance
★  virtualbox ubuntu
★  hyper-v
★  xenserver
  virtualbox performance
  xen performance
  kqemu
  kvm
  qemu-kvm
  ilo
  docker
  vmware server
  xen ubuntu
  virtual box
  xen hypervisor

Your alternative for kvm is not listed? Suggest!
Speaking about kvm, one probably shouldn't forget about wireless keyboard and mouse.

Other search terms related to kvm and their ratings are:
★★★★★ wireless keyboard and mouse
★★★★★ wireless keyboard
★★★★ qemu
★★★ libvirt
★★ logitech unifying receiver
★★ lvm
wireless keyboard mouse
You have in mind a companion for kvm and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of kvm in all years. Click on graph for more.
kvm
xen
virtualbox