There is a way, but it is somewhat complex.
I'm syncing three different iOS devices right now to my MC library using randomly generated playlists and two different PCs. I've been planning to do a nice write-up on it because during the process I discovered a ton of little gotchas here and there.
This won't be that full write up, but I can get you started. Here's what you'll need:
1. You'll want to install iTunes on the HTPC. This works best if the MC server itself also has a copy of iTunes.
2. Use
prod's awesome MCiS add-on to sync your FULL MC library over to this copy of iTunes. You can schedule this to run on a timed basis.
3. You might need to sacrifice some hard drive space to have an iTunes compatible "cache" of your music files (this is the hard part that I need to document), if you have lots of FLAC and other non-iTunes compatible formats in your Library.
4. I'd set MCiS up on the HTPC to just sync and then close iTunes. You don't really need to actually use iTunes on your HTPC, just have it sync there. That's because syncing MCiS across the network is very slow and unreliable. The media files themselves will need to be available on a network share, though, so that the laptop can access them "in the same place" as the HTPC. This is probably already the case so that MC on the Laptop can use them.
5.
Set up GoodSync to sync the contents of your iTunes "Library" (the database files, not the actual media) over to your Laptop. GoodSync can be set up so that it works much like Dropbox in that when the contents of the monitored directory change, it automatically syncs the changes. You'll want a copy of GoodSync on both the HTPC and the laptop. This will work EVEN when the Laptop isn't on your home network (GoodSync is awesome).
6. Set up iTunes on your Laptop. It will be easiest to do this with Windows -> Windows copies of iTunes (because otherwise the OSX iTunes has to rebuild paths for each sync, since OSX doesn't have things like M:\) I think it is possible to use GoodSync to sync an iTunes library to a Mac, but I've never tried it. Make sure the Laptop copy of iTunes uses the library files that are synced over from GoodSync.
If you do all that, then each time you open your copy of iTunes on the Laptop, it will be using a database identical to the one on the HTPC, which has been synced to MC.
You can do LOTS of fancy things using MC's SmartList functionality. I have a set of playlists that determine what gets synced over to my iOS devices, and includes things like Play Doctor lists, Top Hits, New Imports, and others.